TY - GEN
A1 - Merchel, Silke
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Vogl, Jochen
A1 - Frisch, A.
A1 - Reiche, I.
T1 - Kunst- und Kulturgüter unter "Beschuss"
T2 - GDCh-Jahrestagung Chemie 2003 ; Jahrestagung der Fachgruppe Nuklearchemie ; 19. Seminar Aktivierungsanalyse
CY - München, Deutschland
DA - 2003-10-06
PY - 2003
SN - 3-936028-14-1
N1 - Serientitel: Kurzreferate / GDCh-Jahrestagung Chemie 2003 – Series title: Kurzreferate / GDCh-Jahrestagung Chemie 2003
IS - 5
SP - 68
PB - Gesellschaft Deutscher Chemiker
CY - Frankfurt am Main
AN - OPUS4-2686
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Merchel, Silke
A1 - Riesemeier, Heinrich
A1 - Görner, Wolf
A1 - Riederer, J.
A1 - Roth, M.
ED - Simionovici, A.
T1 - BAMline meets Dürer and Van Eyck - Spatially resolved SR-XRF analyses of silver point drawings and their mysterious inscriptions
T2 - 17th International Conference on X-Ray Optics and Microanalysis ; 17th ICXOM
CY - Chamonix, France
DA - 2003-09-22
PY - 2003
N1 - Serientitel: Spectrochimica acta : Part B, Atomic spectroscopy – Series title: Spectrochimica acta : Part B, Atomic spectroscopy
IS - 59.2004,10/11
SP - 48
PB - Elsevier
CY - Amsterdam
AN - OPUS4-2690
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
T1 - Silberstiftzeichnungen - Zerstörungsfreie Spurenanalyse mit Synchrotronstrahlung
T2 - 10. IADA-Kongress (Internationale Arbeitsgemeinschaft der Archiv-, Bibliotheks- und Graphikrestauratoren)
CY - Göttingen, Deutschland
DA - 2003-09-21
PY - 2003
SN - 1563-2628
VL - 4
PB - Foto Text Verl.
CY - Stuttgart
AN - OPUS4-2663
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Berger, Achim
A1 - Ecker, Klaus
A1 - Görner, Wolf
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Segebade, Christian
T1 - Strahlenverfahren in Kombination - ein Werkzeug für Analyse und Zertifizierung von Feststoffen
T2 - 12. Jahrescolloquium "Analyse von Feststoffen unterschiedlicher Materialien aus Industrie und Umwelt"
CY - Berlin, Deutschland
DA - 2002-11-19
PY - 2002
SP - 1(?)
AN - OPUS4-2025
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
T1 - Schwefelbestimmung in Kraftstoffen mittels SYRFA
N2 - Orientierende Versuche zur Schwefelbestimmung in Kraftstoffen haben gezeigt, dass die Röntgenbeamline der BAM bei BESSY II geeignet ist, Schwefel auch in kleinen Konzentrationen zu bestimmen. Da das Verfahren der synchrotronstrahlungsinduzierten Röntgenfluoreszenzanalyse (SYRFA) für den Vor-Ort-Einsatz nicht geeignet ist, ist das Ziel der Untersuchungen, durch Variation von Anregungsenergie und -geometrie mögliche Quellen für systematische Fehler zu untersuchen. Durch geeignete Korrekturfaktoren kann dann die Richtigkeit der Analyseergebnisse gewährleistet werden. Das Verfahren soll dann als Alternative bzw. Ergänzung zu zerstörenden Verfahren der Schwefelanalyse Anwendung finden. Damit wird ein Beitrag zur künftigen Herstellung zertifizierter Referenzmaterialien (ZRM) geleistet.
T2 - Jahrestagung Zerstörungsfreie Materialprüfung 2003
CY - Mainz, Deutschland
DA - 2003-05-26
PY - 2003
UR - http://www.ndt.net/article/dgzfp03/papers/p05/p05.htm
SN - 3-931381-47-1
N1 - Serientitel: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V. – Series title: Berichtsband / Deutsche Gesellschaft für zerstörungsfreie Prüfung e. V.
IS - 83-CD
PB - DGZfP
CY - Berlin
AN - OPUS4-2558
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Duval, A.
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
T1 - Metallstiftzeichnungen Albrecht Dürers
KW - Synchrotron
KW - XRF analysis
KW - Drawings
KW - Archaeometry
KW - Röntgenfluoreszenzanalyse (RFA)
KW - Zeichnungen
KW - Archäometrie
KW - Albrecht Dürer
PY - 2004
SN - 1563-2628
VL - 5
IS - 2
SP - 30
EP - 38
PB - Foto Text Verl.
CY - Stuttgart
AN - OPUS4-3570
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Frisch, A.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Vogl, Jochen
ED - Röhrs, S.
T1 - Synchrotron-XRF und PIXE Untersuchungen an bronzezeitlichen Fussringen
T2 - Jahrestagung 2003 im Ethnologischen Museum Berlin-Dahlem
CY - Berlin, Deutschland
DA - 2003-03-12
PY - 2003
SN - 3-00-014223-1
SN - 0949-4057
SP - 101
EP - 103
CY - [Frankfurt am Main]
AN - OPUS4-2355
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Duval, A.
A1 - Görner, Wolf
A1 - Guicharnaud, H.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
A1 - Roth, M.
ED - Röhrs, S.
T1 - Auf den Spuren Albrecht Dürers - Zerstörungsfreie Untersuchung von Silberstiftzeichnungen mittels Mikro-PIXE und Synchrotron-induzierter Mikro-RFA
T2 - Jahrestagung 2003 im Ethnologischen Museum Berlin-Dahlem
CY - Berlin, Deutschland
DA - 2003-03-12
PY - 2003
SN - 3-00-014223-1
SN - 0949-4057
SP - 118
EP - 120
CY - [Frankfurt am Main]
AN - OPUS4-2356
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Denker, A.
A1 - Hahn, Oliver
A1 - Kanngießer, B.
A1 - Malzer, W.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Röhrs, S.
A1 - Reiche, I.
A1 - Stege, H.
T1 - Chemie der Kunst - Zerstörungsfreie Analyse von Kunst- und Kulturgütern
N2 - Naturwissenschaftliche Informationen, insbesondere die chemische Zusammensetzung der Objekte, können Hinweise auf die Hintergründe der Objektherstellung liefern, die der alleinigen kunsthistorischen Begutachtung verborgen blieben. Es können nicht nur Fragen nach dem Prozess, Zeitpunkt und Ort der Herstellung beantwortet werden. Die chemische Analyse gibt auch Hinweise auf Ereignisse und Veränderungen, die erst nach der Fertigstellung des Objektes erfolgten. So werden Alterungsphänomene oder historische Überarbeitungen und Restaurierungen aufgedeckt, aber auch Konservierungsstrategien zur Erhaltung der Kunstwerke unterstützt. Durch den technologischen Fortschritt im Bereich der röntgenanalytischen Methoden, die berührungsfrei, ohne Probennahme und ohne Schädigung für das Untersuchungsobjekt arbeiten, erschließen sich dem Analytiker erstmalig Möglichkeiten, auch sehr wertvolle und fragile Objekte zerstörungsfrei zu untersuchen.
PY - 2003
DO - https://doi.org/10.1515/mt-2003-0003
SN - 0025-5300
VL - 45
IS - 11-12
SP - 485
EP - 503
PB - Carl Hanser Verlag
CY - München
AN - OPUS4-2745
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Duval, A.
A1 - Görner, Wolf
A1 - Guicharnaud, H.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
T1 - Traces of Albrecht Dürer: Non-destructive analyses of Renaissance silverpoint drawings
KW - Nuclear industry
KW - Nuclear medicine
PY - 2004
SN - 92-0-114703-1
SN - 0074-1876
IS - 1181
SP - 138
EP - 142
PB - IAEA
CY - Vienna
AN - OPUS4-5548
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - XANES Measurements On Glass Samples at the BAMline
T2 - PRORA-Fachtagung "Prozessnahe Röntgenanalytik"
CY - Berlin, Germany
DA - 2005-11-24
PY - 2005
AN - OPUS4-11651
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - von Bohlen, A.
A1 - Hergenröder, R.
A1 - Sternemann, C.
A1 - Paulus, M.
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
T1 - Wavelenght Dispersive Synchrotron Microprobe Used for Material Analysis
N2 - Synchrotron radiation (SR) has been used in recent years as an excellent excitation source for X-ray fluorescence spectrometry. SR offers, in contrast to conventional X-ray sources, highly brilliant polychromatic, polarized radiation with which micro-domain X-ray fluorescence spectrometry becomes possible. A feasibility study of utility, conducted at BESSY (Berlin) and at DELTA (Dortmund), both synchrotron facilities of the third generation, to evaluate the use of wavelength dispersive X-ray fluorescence spectrometry in combination with synchrotron radiation is presented. First results for material analysis, obtained by combining the synchrotron radiation and a commercially available spectrometer commonly attached to a scanning electron microscope, are presented. The spectrometer, of the linear type, uses curved focusing Bragg-crystals of the Johann type which leads to a high spectral resolution up to 3 eV. Examples of micro-domain analyses are presented and compared with those obtained by synchrotron radiation induced energy dispersive X-ray fluorescence.
KW - Synchrotron radiation
KW - WDXRF
KW - EDXRF
KW - Micro analysis
KW - Material analysis
PY - 2005
DO - https://doi.org/10.1081/CI-200048048
SN - 1073-9149
SN - 1525-6030
VL - 33
IS - 2
SP - 137
EP - 150
PB - Dekker
CY - New York, NY
AN - OPUS4-14235
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Guerra, M. F.
A1 - Calligaro, T.
A1 - Radtke, Martin
A1 - Reiche, I.
A1 - Riesemeier, Heinrich
T1 - Fingerprinting ancient gold by measuring Pt with spatially resolved high energy Sy-XRF
N2 - Trace elements of ancient gold such as Pt, give fundamental information on the circulation of the metal in the past. In the case of objects from the cultural heritage, the determination of trace elements requires non-destructive point analysis in general. These conditions and the need of good detection limits restrain the number of applicable analytical techniques.
After the development of a PIXE set-up with a selective Cu or Zn filter of 75 µm and of a PIXE-XRF set-up using a primary target of As, we tested the possibilities of spatially resolved Sy-XRF to determine Pt in gold alloys. With a Zn filter, PIXE showed a detection limit of 1000 ppm in gold while PIXE-XRF lowers this detection limit down to 80 ppm. This last value being constrained by the resonant Raman effect produced on gold. In order to improve the detection limit of Pt keeping the non-destructiveness and access to point analysis, we developed an analytical protocol for XRF with synchrotron radiation at BESSY II, using the BAMline set-up. The L-lines of Pt were excited by a beam of energy above and below 11.564 keV and measured using a Si(Li) detector with a 50 µm Cu filter. A µ-beam of 100250 µm2 was used according to the size of the sample. The determination of the Pt content in the samples was carried out by Monte-Carlo simulation and subtraction of Au and Pt spectra obtained on pure standards. The limit of detection for Pt of 20 ppm was determined by using certified standards. The detection limits of a small set of other characteristic elements of gold were also measured using an incident energy of 33 keV.
KW - PIXE-XRF
KW - Sy-XRF
KW - Pt
KW - Ancient gold
KW - Fingerprinting
PY - 2005
DO - https://doi.org/10.1016/j.nimb.2005.06.150
SN - 0168-583X
SN - 1872-9584
VL - 240
IS - 1-2
SP - 505
EP - 511
PB - Elsevier
CY - Amsterdam
AN - OPUS4-14236
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Wolff, Timo
A1 - Hahn, Oliver
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Denker, A.
T1 - Four non-destructive X-Ray methods analyzing corroded coins: A self-critical comparison
T2 - Workshop Synchrotron Radiation in Art and Archaeology 2006
CY - Berlin, Germany
DA - 2006-09-27
PY - 2006
AN - OPUS4-14229
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Görner, Wolf
A1 - Eichelbaum, Maik
A1 - Matschat, Ralf
A1 - Rademann, K.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
T1 - Non-destructive investigation of composition, chemical properties and structure of materials by synchrotron radiation
PY - 2006
SN - 0007-1137
VL - 48
IS - 9
SP - 540
EP - 544
PB - British Institute of Non-Destructive Testing
CY - Northampton
AN - OPUS4-14186
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Duval, A.
A1 - Görner, Wolf
A1 - Guicharnaud, H.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
A1 - Roth, M.
ED - Denker, A.
ED - Adriaens, A.
ED - Dowsett, M.
ED - Giumlia-Mair, A.
T1 - Synchrotron radiation and protons on the traces of famous artists - Non-destructive analyses of silverpoint drawings by Albrecht Dürer
KW - X-ray spectrometry
KW - XRF
KW - Röntgenfluoreszenzanalyse
KW - RFA
KW - Silverpoint drawing
KW - Silberstiftzeichnung
PY - 2006
SN - 3-8167-7178-5
SP - 91
EP - 101
PB - Fraunhofer-IRB-Verl.
CY - Stuttgart
AN - OPUS4-14190
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Reiche, I.
A1 - Radtke, Martin
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Riesemeier, Heinrich
A1 - Bevers, H.
T1 - Spatially resolved synchrotron radiation induced X-ray fluorescence analyses of rare Rembrandt silverpoint drawings
N2 - New analyses of a series of very rare silverpoint drawings that were executed by Rembrandt Harmensz. van Rijn (16061669) which are kept today in the Kupferstichkabinett (Museum of Prints and Drawings) of the State Museums of Berlin are reported here. Analysis of these drawings requires particular attention because the study has to be fully non-destructive and extremely sensitive. The metal alloy on the paper does not exceed some hundreds of µg/cm². Therefore, synchrotron radiation induced X-ray fluorescence (SR-XRF) is together with external micro-proton-induced X-ray emission the only well-suited method for the analyses of metalpoint drawings. In some primary work, about 25 German and Flemish metalpoint drawings were investigated using spatially resolved SR-XRF analysis at the BAMline at BESSY. This study enlarges the existing FrenchGerman database of metalpoint drawings dating from the 15th and 16th centuries, as these Rembrandt drawings originate from the 17th century where this graphical technique was even rarer and already obsolete. It also illustrates how SR-XRF analysis can reinforce art historical assumptions on the dating of drawings and their connection.
KW - X-ray spectrometry
KW - XRF
KW - Röntgenfluoreszenzanalyse
KW - RFA
KW - Silverpoint drawing
KW - Silberstiftzeichnung
PY - 2006
DO - https://doi.org/10.1007/s00339-006-3505-4
SN - 0947-8396
VL - 83
IS - 2
SP - 169
EP - 173
PB - Springer
CY - Berlin
AN - OPUS4-12532
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Procop, Mathias
A1 - Radtke, Martin
A1 - Krumrey, M.
A1 - Hasche, K.
A1 - Schädlich, S.
A1 - Frank, W.
T1 - Electron probe microanalysis (EPMA) measurement of thin-film thickness in the nanometre range
N2 - The thickness of thin films of platinum and nickel on fused silica and silicon substrates has been determined by EPMA using the commercial software STRATAGEM for calculation of film thickness. Film thickness ranged in the order 10 nm. An attempt was made to estimate the confidence range of the method by comparison with results from other methods of analysis. The data show that in addition to the uncertainty of the spectral intensity measurement and the complicated fitting routine, systematic deviation caused by the underlying model should be added. The scattering in the results from other methods does not enable specification of a range of uncertainty, but deviations from the real thickness are estimated to be less than 20%.
KW - Electron probe microanalysis
KW - EPMA
KW - Thin films
KW - Thickness measurement
KW - X-rays
PY - 2002
DO - https://doi.org/10.1007/s00216-002-1514-5
SN - 1618-2642
SN - 1618-2650
VL - 374
SP - 631
EP - 634
PB - Springer
CY - Berlin
AN - OPUS4-7090
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Schlosser, S.
A1 - Radtke, Martin
A1 - Pernicka, E.
T1 - Vultures hit by beam
PY - 2005
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2004.pdf#page=497
SN - 0179-4159
SP - 497
EP - 499
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-7385
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Armbruster, B.
A1 - Eilbracht, H.
A1 - Grüger, A.
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
A1 - Reiche, I.
T1 - The Vikings in Berlin: SR-XRF analyses of the Hiddensee gold jewellery
PY - 2005
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/infos/bessy/highlights2004.pdf#page=32
SN - 1611-6127
SP - 32
EP - 33
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-7386
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Duval, A.
A1 - Guicharnaud, H.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Schäfer, D.
A1 - Simon, R.
T1 - SY-XRF study of Hans Baldung Grien silverpoint drawings and the silver stylus from the 'Karlsruhe sketchbook'
N2 - We performed spatially resolved synchrotron-induced x-ray fluorescence analyses (SY-XRF) of five silverpoint drawings from the famous `Karlsruhe sketchbook´ and a silverpoint, which is assumed to be an original one used by the Renaissance artist Hans Baldung Grien (1484-1545) himself. The silverpoint, one out of a very small number of ancient styli conserved nowadays, is fixed on the so-called `Karlsruhe sketchbook´. Measurements were executed at the FLUO-TOPO beamline at the electron storage ring ANKA. It has been shown, that SY-XRF at this beamline is nondestructive and sensitive enough for the analysis of minor and major elements in the silver strokes. This study provides new insights into this graphical technique and ancient drawing instruments: results are that three drawings have been created with a common type of silverpoint containing about (10.4 ± 0.7) wt% of Cu. In all the cases, Hg at a 10% level by weight was identified in the strokes. Presence of Hg is not due to the original silver alloy, but is a result of a general alteration phenomenon of silverpoint drawings. This fact is confirmed by the analysis of the original silverpoint, which contains only small traces of Hg. The result for the copper content of the silverpoint (10.4 ± 1.7) wt% is in good agreement with that of these three drawings. It is supposable that the silverpoint found attached today served for the creation of the corresponding drawings. Moreover, the graphical technique of Baldung is found to be continual over three decades. Only one very late drawing dated to 1543 was probably realized with another silverpoint, containing about 3 wt% of Cu. This difference in the chemical composition of drawings from the late period might be used as a more precise dating indicator of Baldung drawings that are not clearly attributed to a certain period.
KW - Synchrotron
KW - XRF analysis
KW - Drawings
KW - Silver stylus
PY - 2007
DO - https://doi.org/10.1002/xrs.963
SN - 0049-8246
VL - 36
IS - 3
SP - 173
EP - 177
PB - Wiley
CY - Chichester
AN - OPUS4-16150
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Riesemeier, Heinrich
A1 - Ecker, Klaus
A1 - Görner, Wolf
A1 - Müller, Bernd R.
A1 - Radtke, Martin
A1 - Krumrey, M.
T1 - Layout and first XRF Applications of the BAMline at BESSY II+
N2 - The first hard x-ray beamline at BESSY II has been installed by BAM and PTB at a superconducting 7 T wavelength shifter. The main optical elements of the beamline are a double-multilayer monochromator and a double-crystal monochromator. Depending on the application, the two devices are used separately or in-line. The main applications of the monochromatic radiation with photon energies up to 60 keV are x-ray fluorescence analysis, micro computed tomography, x-ray topography, detector calibration and reflectometry. Calculable undispersed radiation up to 200 keV is available for radiometric applications.
KW - BAMline
KW - XRF
PY - 2005
DO - https://doi.org/10.1002/xrs.750
SN - 0049-8246
VL - 34
IS - 2
SP - 160
EP - 163
PB - Wiley
CY - Chichester
AN - OPUS4-11929
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Ecker, Klaus
A1 - Wätjen, U.
A1 - Berger, Achim
A1 - Persson, L.
A1 - Pritzkow, Wolfgang
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
T1 - RBS, SY-XRF, INAA and ICP-IDMS of antimony implanted in silicon - A multi-method approach to characterize and certify a reference material
N2 - A layer of Sb atoms, implanted with an energy of 400 keV and a nominal dose of 5×1016 atoms/cm2 into a high purity silicon wafer, was certified for its areal density (atoms/cm2) using Rutherford backscattering spectrometry (RBS), instrumental neutron activation analysis (INAA) and inductively coupled plasma isotope dilution mass spectrometry (ICP-IDMS) and for its isotope ratio using INAA and ICP-IDMS. Excellent agreement between the results of the different independent methods was found. In the present work, the measurements of the homogeneity of the areal density of Sb, previously determined with RBS in spots having 1 mm diameter, are improved with synchrotron X-ray fluorescence analysis: Higher precision in even smaller sample spots allows to estimate a reduced inhomogeneity of the whole batch of samples of the order of only 0.4%. Thus the uncertainty of the certified value can further be reduced. Down to fractions of a chip with 0.3×0.4 mm2 area, the areal density is now certified as (4.81±0.06)×1016 Sb atoms/cm2, where the expanded uncertainty 0.06 (coverage factor k=2) corresponds to only 1.2%. The relative merits of the different analytical methods are discussed.
KW - Certified reference material
KW - RBS
KW - INAA
KW - ICP-IDMS
KW - XRF
KW - SY-XRF
PY - 2002
DO - https://doi.org/10.1016/S0168-583X(01)01038-2
SN - 0168-583X
SN - 1872-9584
VL - 188
IS - 1-4
SP - 120
EP - 125
PB - Elsevier
CY - Amsterdam
AN - OPUS4-13870
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Guerra, M. F.
A1 - Radtke, Martin
A1 - Reiche, I.
A1 - Riesemeier, Heinrich
A1 - Strub, Erik
T1 - Analysis of trace elements in gold alloys by SR-XRF at high energy at the BAMline
N2 - Measuring in a non-destructive way the characteristic trace elements of the metal allows following the circulation of gold in the past. The aim of this work is to probe the possibilities of X-ray fluorescence with high energy synchrotron radiation (SR-XRF) at the BAMline at BESSY II to determine the concentration of Pt in ancient gold alloys. A HP-Ge detector was used to measure the Pt K-lines excited with an incident energy of 79.5 keV. Data processing was done by subtraction of a Pt free gold standard spectrum from the spectrum of the sample. Depending on the sample composition, the MDL ranges between 40 and 90 ppm. The first results obtained for a small set of gold alloys of different thickness, size and composition showed that high energy SR-XRF is a significant method for the non-destructive determination of Pt in gold.
KW - SR-XRF
KW - Gold
KW - Provenancing
KW - Trace elements
PY - 2008
DO - https://doi.org/10.1016/j.nimb.2008.03.008
SN - 0168-583X
SN - 1872-9584
VL - 266
IS - 10
SP - 2334
EP - 2338
PB - Elsevier
CY - Amsterdam
AN - OPUS4-17735
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Constantinescu, B.
A1 - Bugoi, R.
A1 - Cojocaru, V.
A1 - Radtke, Martin
A1 - Calligaro, T.
A1 - Salomon, J.
A1 - Pichon, L.
A1 - Röhrs, S.
A1 - Ceccato, D.
A1 - Oberländer-Târnoveanu, E.
T1 - Micro-SR-XRF and micro-PIXE studies for archaeological gold identification - The case of Carpathian (Transylvanian) gold and of Dacian bracelets
N2 - Trace-elements are more significant for provenancing archaeological metallic artifacts than the main components. For gold, the most promising elements are platinum group elements (PGE), Sn, Te, Sb, Hg and Pb. Several small fragments of natural Transylvanian gold placer and primary were studied by using micro-PIXE technique at the Legnaro National Laboratory AN2000 microbeam facility, Italy and at the AGLAE accelerator, C2RMF, Paris, France and by using micro synchrotron radiation X-ray fluorescence (micro-SR-XRF) at BESSY synchrotron, Berlin, Germany. The goal of the study was to identify the trace-elements, especially Sn, Sb and Te. A spectacular application to five Dacian gold bracelets authentication is presented (Sn and Sb traces).
KW - Micro-PIXE
KW - Micro-SR-XRF
KW - Gold
KW - Dacian bracelets
KW - Transylvania
PY - 2008
DO - https://doi.org/10.1016/j.nimb.2008.03.054
SN - 0168-583X
SN - 1872-9584
VL - 266
IS - 10
SP - 2325
EP - 2328
PB - Elsevier
CY - Amsterdam
AN - OPUS4-17736
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Micro-SR-XRF and Micro-PIXE studies for archaeological gold identification - The case of Carpathian (Transylvanian) gold and of Dacian bracelets
T2 - Ecaart 9
CY - Florence, Italy
DA - 2007-09-03
PY - 2007
AN - OPUS4-17862
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - SR-XRF analysis of trace amounts of Pt in gold alloys
T2 - European Conference on X-ray Spectrometry
CY - Dubrovnik, Croatia
DA - 2008-06-16
PY - 2008
AN - OPUS4-17845
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Mans, C.
A1 - Simons, C.
A1 - Hanning, S.
A1 - Janßen, A.
A1 - Alber, D.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Bühler, A.
A1 - Kreyenschmidt, M.
T1 - New polymeric candidate reference materials for XRF and LA-ICP-MS - development and preliminary characterization
N2 - A set of ten calibration materials based on acrylonitrile-butadiene-styrene terpolymer (ABS) containing the elements Br, Pb, Cd, Cr, and Hg was produced in order to control polymer samples in regard to the restriction on the use of certain hazardous substances (RoHS) directive. The materials were produced with respect to the special demands of X-ray fluorescence analysis (XRF) and inductively coupled plasma mass spectrometry in combination with laser ablation (LA-ICP-MS).
The mass fractions of all elements were 0-1500 mg/kg and the materials were produced as granulates and solid discs with a diameter of 40 mm and thicknesses of 1, 2, and 6 mm. It could be shown that the signals measured by XRF strongly depend on the thickness of polymeric samples.
Macroscopic homogeneity was assessed with XRF measuring a total of 180 samples. The microscopic homogeneities were determined for a material with average elemental mass fractions with the aid of synchrotron radiation (SR) µ-XRF and LA-ICP-MS. Sufficient macroscopic and microscopic homogeneities for all elements could be achieved. It was observed that organic additives show a better homogeneity than oxides.
XRF and LA-ICP-MS were successfully calibrated with the new materials. Limits of detection were in the range of 0.4-22 mg/kg for XRF and 2.3-26.8 mg/kg for LA-ICP-MS. The materials are considered as candidate reference materials (RM) by the Federal Institute of Materials Research and Testing (BAM, Germany).
KW - XRF
KW - LA.ICP-MS Plastics
KW - RoHS
KW - CRM
PY - 2009
DO - https://doi.org/10.1002/xrs.1120
SN - 0049-8246
VL - 38
IS - 1
SP - 52
EP - 57
PB - Wiley
CY - Chichester
AN - OPUS4-18681
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Strub, Erik
A1 - Born, H.
T1 - Neues vom Berliner Goldhut: Materialanalysen mit Synchrotronstrahlung
KW - Sy-RFA
KW - Berliner Goldhut
PY - 2009
SN - 0341-1184
VL - 41
SP - 29
EP - 35
PB - Marie Leidorf GmbH
CY - Berlin
AN - OPUS4-20271
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Vasilescu, A.
A1 - Constantinescu, B.
A1 - Bugoi, R.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Simon, R.
ED - Denecke, M.
ED - Walker, C.
T1 - Gold provenance studies for Romanian archaeological objects using micro-SR-XRF
N2 - Studies by Synchrotron Radiation-X-Ray Fluorescence (SR-XRF) for the search of the presence of trace elements like Sb, Sn, Te and Pb in archaeological metallic objects found on the territory of Romania-old coins and Bronze Age jewelry, aimed to determine the provenance of the gold used in their manufacture. The results are compared with the detailed elemental composition of alluvial or primary gold samples, obtained by the same technique. This work attempted to establish the origin of the gold used for the mint of two different types of koson coins. We found that the kosons with monogram are made of refined gold, while the one used for the kosons without monogram is mainly alluvial. The gold used in the manufacture of the Calarasi Vulchitrun-type disk and the Tauteu hair ring is also of alluvial origin.
T2 - 20th International congress on X-ray optics and microanalysis
CY - Karlsruhe, Germany
DA - 2009-09-14
KW - Provenance
KW - Gold
KW - SR-XRF
KW - Trace elements
PY - 2010
UR - http://link.aip.org/link/?APCPCS/1221/139/1
SN - 978-0-7354-0764-0
DO - https://doi.org/10.1063/1.3399240
SN - 0094-243X
SP - 139
EP - 143
PB - American Institute of Physics
AN - OPUS4-21182
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Radtke, Martin
A1 - Berger, Achim
A1 - Ecker, Klaus
A1 - Merchel, Silke
A1 - Procop, Mathias
A1 - Riesemeier, Heinrich
A1 - Görner, Wolf
A1 - Reiche, I.
T1 - Synchrotron induced X-ray fluorescence for trace element analysis
T2 - Hamburg Workshop
CY - Hamburg, Germany
DA - 2002-09-16
PY - 2002
SN - 3-924330-53-0
SP - 1(?)
PB - Gesellschaft Deutscher Chemiker
AN - OPUS4-1525
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
T1 - Dürer's chemischer Fingerprint - Untersuchungen mittels Synchrotron-induzierter Röntgenfluoreszenzanalyse
T2 - 5. Erfurter Fachtage für Konservierung und Restaurierung
CY - Erfurt, Germany
DA - 2002-11-28
PY - 2002
AN - OPUS4-2123
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Spatial resolved trace analysis of Dürer's silver point drawings by means of SR-XRF
T2 - EDXRS 2002 - European Conference on Energy Dispersive X-Ray Spectrometry
CY - Berlin, Germany
DA - 2002-06-16
PY - 2002
AN - OPUS4-2993
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - BAMline meets Dürer and Van Eyck: Spatialy resolved SR-XRF analyses of silver point drawings and thier mysterious inscriptions
T2 - ICXOM: 17th International Congress on X-ray Optics and Microanalysis
CY - Chamonix, France
DA - 2003-09-22
PY - 2003
AN - OPUS4-3794
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
A1 - Roth, M.
T1 - Following the traces of Albrecht Dürer: analysis of silverpoint drawings by spatially resolved synchrotron-induced X-ray fluorescence analysis
N2 - Spatially resolved X-ray fluorescence analysis using synchrotron radiation (SR-XRF) at the wavelength shifter beamline, BAMline, at BESSY was used to investigate Renaissance silverpoint drawings as it is extremely sensitive, non-destructive and can be carried out in air using an excitation spot in the hundred micrometer range.
This paper deals with first results of the study of silverpoint drawings of Albrecht Dürer (14711528) belonging to the sketchbook that Albrecht Dürer used during a travel to the Netherlands in 1520/21. These results are compared to a PIXE study performed on drawings from the same sketchbook.
The minor element composition of the silverpoint used for the drawings in the sketchbook was (10.6 ± 3.5) wt.% of Cu and traces of Zn. Mercury was found in the marks but does not belong to the initial composition of the silverpoint as it is attributed to an alteration phenomenon. One drawing of the sketchbook represents an exception. It consists of silver marks containing an additional minor element, Zn, in the marks and was, therefore, created with another silverpoint, probably at a different time than the other drawings.
KW - Synchrotron
KW - SR-XRF analysis
KW - Drawing
KW - Silverpoint
KW - Albrecht Dürer
PY - 2004
DO - https://doi.org/10.1016/j.nimb.2004.03.081
SN - 0168-583X
SN - 1872-9584
VL - 226
IS - 1-2
SP - 83
EP - 91
PB - Elsevier
CY - Amsterdam
AN - OPUS4-4574
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Reiche, I.
A1 - Radtke, Martin
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Ketelsen, T.
A1 - Merchel, Silke
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
A1 - Roth, M.
T1 - Spatially resolved synchrotron-induced X-ray fluorescence analyses of metal point drawings and their mysterious inscriptions
N2 - Synchrotron-induced X-ray fluorescence (Sy-XRF) analysis was used to study the chemical composition of precious Renaissance silverpoint drawings. Drawings by famous artists such as Albrecht Dürer (14711528) and Jan van Eyck (approximately 13951441) must be investigated non-destructively. Moreover, extremely sensitive synchrotron- or accelerator-based techniques are needed since only small quantities of silver are deposited on the paper. New criteria for attributing these works to a particular artist could be established based on the analysis of the chemical composition of the metal points used. We illustrate how analysis can give new art historical information by means of two case studies. Two particular drawings, one of Albrecht Dürer, showing a profile portrait of his closest friend, Willibald Pirckheimer (1503), and a second one attributed to Jan van Eyck, showing a Portrait of an elderly man, often named Niccolò Albergati, are the object of intense art historical controversy. Both drawings show inscriptions next to the figures. Analyses by Sy-XRF could reveal the same kind of silverpoint for the Pirckheimer portrait and its mysterious Greek inscription, contrary to the drawing by Van Eyck where at least three different metal points were applied. Two different types of silver marks were found in this portrait. Silver containing gold marks were detected in the inscriptions and over-subscriptions. This is the first evidence of the use of gold points for metal point drawings in the Middle Ages.
KW - Sy-XRF analysis
KW - Drawing
KW - Metal point
KW - Albrecht Dürer
KW - Jan van Eyck
KW - Renaissance
PY - 2004
DO - https://doi.org/10.1016/j.sab.2004.07.023
SN - 0584-8547
SN - 0038-6987
VL - 59
IS - 10-11
SP - 1657
EP - 1662
PB - Elsevier
CY - Amsterdam
AN - OPUS4-4575
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Strub, Erik
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Reznikova, E.
T1 - Measurements with compound refractive lenses at the "BAMline"
N2 - A set of compound refractive lenses (CRLs), mounted on a silicon wafer, was obtained from the Institut für Mikrostrukturtechnik Karlsruhe. The CRLs were characterized at the BAMline at the synchrotron BESSYII in Berlin. It could be demonstrated that beam diameters below 1 µm can be obtained. The beam size accepted by the lenses is (140 × 140) µm2, thus the intensity gain in the micrometer spot, including absorption, is about 15,000. It is possible to switch between different beam energies within a few minutes. First results of scans and the application of the lenses for MicroXANES (X-ray absorption near-edge structure) measurements are presented in this paper. Also, the possibility of MicroEXAFS (extended X-ray absorption fine structure) measurements is discussed.
KW - X-ray optics
KW - XANES
KW - EXAFS
KW - XAS
KW - XRF
KW - Speciation
PY - 2008
DO - https://doi.org/10.1016/j.nimb.2008.02.057
SN - 0168-583X
SN - 1872-9584
VL - 266
IS - 10
SP - 2165
EP - 2168
PB - Elsevier
CY - Amsterdam
AN - OPUS4-17554
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Strub, Erik
A1 - Plarre, Rüdiger
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Schoknecht, Ute
A1 - Urban, Klaus
A1 - Jüngel, P.
T1 - Determination of Cr(VI) in wood specimen: A XANES study at the Cr K edge
N2 - The content of chromium in different oxidation states in chromium-treated wood was studied with XANES (X-ray absorption near-edge structure) measurements at the Cr K absorption edge. It could be shown that wood samples treated with Cr(VI) (pine and beech) did still contain a measurable content of Cr(VI) after four weeks conditioning. If such wood samples were heat exposed for 2 h with 135 °C prior conditioning, Cr(VI) was no longer detected by XANES, indicating a complete reduction to chromium (III).
KW - X-ray spectroscopy
KW - XANES
KW - XAS
KW - XRF
KW - Specifikation
KW - Reduction
PY - 2008
DO - https://doi.org/10.1016/j.nimb.2008.03.011
SN - 0168-583X
SN - 1872-9584
VL - 266
IS - 10
SP - 2405
EP - 2407
PB - Elsevier
CY - Amsterdam
AN - OPUS4-17555
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The use of Synchrotron Radiation induced X-Rax Fluorescence for the Chracterization of Ancient Gold objects
T2 - AURUM: workshop on authentication and analysis of gold work
CY - Paris, France
DA - 2009-05-11
PY - 2009
AN - OPUS4-18532
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Bjeoumikhov, A.
A1 - Bjeoumikhova, Zemfira
A1 - Riesemeier, Heinrich
A1 - Radtke, Martin
A1 - Wedell, R.
T1 - Propagation of synchrotron radiation through nanocapillary structures
N2 - The propagation of synchrotron radiation through nanocapillary structures with channel sizes of 200 nm and periods in the micrometer size has been studied experimentally. It was shown that the propagation through individual capillary channels has a mode formation character. Furthermore it was shown that during the propagation through capillary channels the coherence of synchrotron radiation is partially conserved. Interference of beams propagating through different capillary channels is observed which leads to a periodically modulated distribution of the radiation intensity in a plane far from the exit of the structure. These investigations are of high relevance for the understanding of X-ray transmission through nanocapillaries and the appearance of wave properties at this size scale.
KW - Polycapillary structure
KW - Nanocapillary
KW - X-ray optics
KW - Wave properties
KW - Synchrotron radiation
KW - X-ray diffraction
PY - 2007
DO - https://doi.org/10.1016/j.physleta.2007.01.092
SN - 0031-9163
SN - 0375-9601
VL - 366
IS - 4-5
SP - 283
EP - 288
PB - North-Holland Publ. Co.
CY - Amsterdam
AN - OPUS4-20580
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Simons, C.
A1 - Mans, C.
A1 - Hanning, S.
A1 - Janßen, A.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Ostermann, Markus
A1 - Michaelis, Matthias
A1 - Wienold, Julia
A1 - Alber, D.
A1 - Kreyenschmidt, M.
T1 - Study on microscopic homogeneity of polymeric candidate reference materials BAM H001-BAM H010 by means of synchrotron µ-XRF and LA-ICP-MS
N2 - In this study the microscopic homogeneity of the newly developed plastic reference materials BAM H001-BAM H010 was investigated. The materials consist of an acrylonitryle-butadien-styrene terpolymer, doped with different amounts of the elements Br, Cd, Cr, Hg and Pb. For the quantitative determination of the degree of homogeneity, a procedure proposed by Kempenaers et al. (Fresenius J. Anal. Chem., 2001, 369, 733-737) was used. On every sample an extensive number of different points were analyzed and standard deviation for every element mentioned above was used to calculate a minimal sampling mass that is necessary to reach a certain level of uncertainty caused by inhomogeneity (mmin,5%). The experiments were taken out with synchrotron µ-XRF (SR µ-XRF) at BESSYII in Berlin and by laser ablation inductively coupled plasma mass spectroscopy (LA-ICP-MS). The calculated values for mmin,5% of both techniques showed comparable results for all elements. It could be shown that the materials are suitable for calibration of micro analytic techniques if at least 64 µg are used.
KW - XRF
KW - LA-ICP-MS
KW - RoHS
KW - CRM
PY - 2010
DO - https://doi.org/10.1039/b917008a
SN - 0267-9477
SN - 1364-5544
VL - 25
SP - 40
EP - 43
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-20938
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Brücher, M.
A1 - von Bohlen, A.
A1 - Jacob, P.
A1 - Franzke, J.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Müller, Bernd R.
A1 - Scharf, Oliver
A1 - Hergenröder, R.
T1 - The charge of solid-liquid interfaces measured by X-ray standing waves and streaming current
N2 - Measurements of ion distributions at a charged solid–liquid interface using X-ray standing waves (XSW) are presented. High energy synchrotron radiation (17.48 keV) is used to produce an XSW pattern inside a thin water film on a silicon wafer. The liquid phase is an aqueous solution containing Br and Rb ions. The surface charge is adjusted by titration. Measurements are performed over a pH range from 2.2–9, using the native Si oxide layer and functional (amine) groups as surface charge. The Debye length, indicating the extension of the diffuse layer, could be measured with values varying between 1–4 nm. For functionalized wafers, the pH dependent change from attraction to repulsion of an ion species could be detected, indicating the isoelectric point. In combination with the measurement of the streaming current, the surface charge of the sample could be quantified.
KW - Interfacial charge
KW - Solid/liquid interfaces
KW - Surface analysis
KW - Surface functionalization
KW - X-ray spectrometry
KW - X-ray
KW - Standing waves
KW - XSW
KW - Streaming current
KW - Synchrotron radiation
PY - 2010
DO - https://doi.org/10.1002/cphc.201000166
SN - 1439-4235
SN - 1439-7641
VL - 11
IS - 10
SP - 2118
EP - 2123
PB - Wiley-VCH Verl.
CY - Weinheim
AN - OPUS4-22057
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Materialforschung an der BAMline
T2 - Seminar Strahlenphysikalische Anwendungen in Technik und Medizin
CY - Vienna, Austria
DA - 2009-01-28
PY - 2009
AN - OPUS4-19183
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Neues vom Berliner Goldhut: Analyse mit Sy-RFA
T2 - Deutsche Tagung für Forschung mit Synchrotronstrahlung, Neutronen und Ionenstrahlen, SNI 2010
CY - Berlin, Germany
DA - 2010-02-24
PY - 2010
AN - OPUS4-20097
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Das Hiddensee-Projekt
T2 - Kulturgut durchleutet - Strahlung trifft Kulturgut (Symposium)
CY - Berlin, Germany
DA - 2009-11-04
PY - 2009
AN - OPUS4-20771
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Von der Bronzezeit ins 21. Jahrhundert - Materialcharakterisierung mit SyXRF an der BAMline
T2 - 17. Sitzung des Fachausschusses Zerstörungsfreie Materialcharakterisierung, DGZFP
CY - Berlin, Germany
DA - 2009-11-10
PY - 2009
AN - OPUS4-20772
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Polte, Jörg
A1 - Emmerling, Franziska
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Thünemann, Andreas
T1 - Real-time monitoring of copolymer stabilized growing gold nanoparticles
N2 - A great challenge in the production of nanoparticles with defined sizes and properties is to control their growth in situ. We developed a dedicated combined small-angle X-ray scattering (SAXS) and X-ray absorption spectroscopy (XAS) setup to monitor nanoparticle formation in solution. The capabilities of simultaneously deriving particle sizes and oxidation states of atoms/ions are illustrated for the formation of spherical gold nanoparticles by the reduction of hydrogen tetrachloroaureate (HAuCl4). Particles with initial radii of 4.60 ± 0.10 nm and final radii of 5.67 ± 0.10 nm were produced in a levitated droplet with a volume of 4 µL. An ethylene oxide/propylene oxide triblock copolymer PEO-PPO-PEO (Pluronic F-127) functions as reducing agent and colloidal stabilizer. XANES shows in situ how the gold was reduced in the droplet from Au(III) to Au(0), and simultaneously SAXS recorded the size distribution of the formed nanoparticles. It is shown that the final particle number is reached quickly. Thereafter, only the particles sizes increase. Comparison of XANES and SAXS shows that the quantity of Au(0) is higher than the quantity of gold located in the nanoparticles while the particles are growing. Finally, all the Au(0) is found in the nanoparticles. We tentatively attribute this finding to the pseudo crown ether effect of the polymer surfactant that kinetically stabilizes gold atoms when formed from gold ions within their protecting cavity. A simple burst mechanism for the gold nanoparticle formation is the consequence. The possibility of an inhomogeneous particles structure with an enhanced density near the particle surface is discussed.
PY - 2010
DO - https://doi.org/10.1021/la903829q
SN - 0743-7463
SN - 1520-5827
VL - 26
IS - 8
SP - 5889
EP - 5894
PB - American Chemical Society
CY - Washington, DC
AN - OPUS4-21223
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Characterization of precious metal objects with SRXRF at the Bamline
T2 - Synchrotron Radiation in Art & Archaeology (SR2A-2010)
CY - Amsterdam, Netherlands
DA - 2010-11-07
PY - 2010
AN - OPUS4-21244
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
T1 - Spatially-resolved detection of iodine in natural platinum-palladium nuggets: a comparison of PIXE and XRF
T2 - European Conference on X-ray Spectrometry
CY - Figueira da Foz, Portugal
DA - 2010-06-20
PY - 2010
AN - OPUS4-21201
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - X-ray camera with high energy and spital resolution: Sterography with a colour X-ray camera
T2 - European Conference on X-ray Spectrometry
CY - Figueira da Foz, Portugal
DA - 2010-06-20
PY - 2010
AN - OPUS4-21205
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Constantinescu, B.
A1 - Vasilescu, A.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
T1 - Micro-SR-XRF studies for archaeological gold identification - the case of carpathian gold and romanian museal objects
N2 - In the determination of the provenance of gold in archaeological artifacts, trace elements are more significant than the main components. Several minute fragments of natural Carpathian gold-placer and primary-and some very small (a few milligrams) fragments of archaeological items were studied using micro Synchrotron Radiation X-Ray Fluorescence (micro SR-XRF) at the BESSY Synchrotron Facility in Berlin, Germany. The goal of the study was to identify the trace elements characterizing Carpathian gold, looking especially at Sn, Sb, Pb and Te, and to determine if the gold in the archaeological items is native or refined. Applications to the authentication and provenance of nine Dacian gold bracelets, koson coins and two Bronze Age items are presented.
KW - Gold
KW - Provenance
KW - Archeometry
KW - Sy-XRF
PY - 2010
DO - https://doi.org/10.1007/s00339-010-5624-1
SN - 0947-8396
VL - 99
IS - 2
SP - 383
EP - 389
PB - Springer
CY - Berlin
AN - OPUS4-21395
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - SRXRF - measurements at non planar objects: Automatic determination of the angle of inicidence of the exciting X-ray
T2 - Synchroton Radiation in Art & Avhaelogy (SR2A-2010)
CY - Amsterdam, Netherlands
DA - 2010-11-07
PY - 2010
AN - OPUS4-21378
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Hodoroaba, Vasile-Dan
A1 - Radtke, Martin
A1 - Vincze, L.
A1 - Rackwitz, Vanessa
A1 - Reuter, Dirk
T1 - X-ray scattering in X-ray fluorescence spectra with X-ray tube excitation - Modelling, experiment, and Monte-Carlo simulation
N2 - X-ray scattering may contribute significantly to the spectral background of X-ray fluorescence (XRF) spectra. Based on metrological measurements carried out with a scanning electron microscope (SEM) having attached a well characterised X-ray source (polychromatic X-ray tube) and a calibrated energy dispersive X-ray spectrometer (EDS) the accuracy of a physical model for X-ray scattering is systematically evaluated for representative samples. The knowledge of the X-ray spectrometer efficiency, but also of the spectrometer response functions makes it possible to define a physical spectral background of XRF spectra. Background subtraction relying on purely mathematical procedures is state-of-the-art. The results produced by the analytical model are at least as reliable as those obtained by Monte-Carlo simulations, even without considering the very challenging contribution of multiple scattering. Special attention has been paid to Compton broadening. Relevant applications of the implementation of the analytical model presented in this paper are the prediction of the limits of detection for particular cases or the determination of the transmission of X-ray polycapillary lenses.
KW - X-ray scattering
KW - X-ray fluorescence
KW - Spectral background
KW - Modelling
KW - Monte-Carlo simulation
PY - 2010
DO - https://doi.org/10.1016/j.nimb.2010.09.017
SN - 0168-583X
SN - 1872-9584
VL - 268
IS - 24
SP - 3568
EP - 3575
PB - Elsevier
CY - Amsterdam
AN - OPUS4-22357
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Görner, Wolf
A1 - Berger, Achim
A1 - Merchel, Silke
A1 - Pernicka, E.
A1 - Radtke, Martin
A1 - Reiche, I.
A1 - Reinholz, Uwe
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
A1 - Wunderlich, C. H.
T1 - Kunst- und Kulturgüter unter "Beschuss"
T2 - Jahrestagung Zerstörungsfreie Materialprüfung 2004
CY - Salzburg, Österreich
DA - 2004-05-17
KW - SY-RFA
KW - PIXE
KW - PIGE
KW - PAA
KW - Zerstörungsfreie Analyse
KW - Silberstiftzeichnungen
KW - Himmelsscheibe von Nebra
KW - Indische Moghulmalereien
PY - 2004
UR - http://www.ndt.net/article/dgzfp04/papers/p46/p46.htm
SN - 3-931381-55-2
SP - 1(?)
EP - 11(?)
PB - DGZfP
CY - Berlin
AN - OPUS4-6897
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Denker, A.
A1 - Hahn, Oliver
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Kanngießer, B.
A1 - Malzer, W.
A1 - Röhrs, S.
A1 - Reiche, I.
A1 - Stege, H.
T1 - Röntgenanalytik für Kunstwerke und Kulturgüter
N2 - Naturwissenschaftler arbeiten mit Archäologen, Kunsthistorikern und Restauratoren zusammen, um Materialinformationen über Kunstwerke mit den Erkenntnissen aus Altertumsforschung, Kunstgeschichte und Denkmalpflege zu verbinden. Röntgenfluoreszenz und Röntgenemission sind die Methoden der Wahl, wenn wertvolle und fragile Objekte zerstörungsfrei zu untersuchen sind.
KW - Synchrotron
KW - XRF analysis
KW - Drawings
KW - Paintings
KW - Ink
KW - Art objects
KW - Archaeometry
KW - Röntgenfluoreszenzanalyse (RFA)
KW - Zeichnungen
KW - Gemälde
KW - Tinten
KW - Kunstobjekte
KW - Archäometrie
PY - 2005
SN - 1439-9598
SN - 1521-3854
VL - 53
IS - 2
SP - 118
EP - 123
PB - Wiley-VCH Verl.
CY - Weinheim
AN - OPUS4-6898
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Bevers, H.
A1 - Dupuis, G.
A1 - Duval, A.
A1 - Görner, Wolf
A1 - Guicharnaud, H.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
A1 - Roth, M.
T1 - Spatially resolved SR-XRF analyses of complex drawings by the Holbein family and silverpoint drawings by Rembrandt
KW - X-ray spectrometry
KW - XRF
KW - Röntgenfluoreszenzanalyse
KW - RFA
KW - Silverpoint drawing
KW - Silberstiftzeichnung
PY - 2005
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2004.pdf#page=491
SN - 0179-4159
SP - 491
EP - 493
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-7380
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Eichelbaum, M.
A1 - Rademann, K.
A1 - Müller, Ralf
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
A1 - Görner, Wolf
T1 - Vom Atom zum Nanodraht: Kontrolliertes Wachstum von Edelmetall-Nanokristalliten in Kalk-Natron-Silikatglas
T2 - 79. Glastechnische Tagung
CY - Würzburg, Deutschland
DA - 2005-05-23
KW - Glas
KW - Metallnanocluster
KW - Optische Eigenschaften
PY - 2005
SN - 3-921089-43-3
SP - 15 Seiten
PB - Deutsche Glastechnische Gesellschaft
CY - Offenbach
AN - OPUS4-7558
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Duval, A.
A1 - Görner, Wolf
A1 - Guicharnaud, H.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
A1 - Roth, M.
ED - Marabelli, M.
ED - Tabaso, M.
T1 - Spatially resolved SR-XRF analyses of complex drawings of the Holbein family
T2 - 8th International Conference on "Non-Destructive Investigations and Microanalysis for the Diagnostics and Conservation of the Cultural and Environmental Heritage"
CY - Lecce, Italy
DA - 2005-05-15
KW - X-ray spectrometry
KW - XRF
KW - Röntgenfluoreszenzanalyse
KW - RFA
KW - Silverpoint drawing
KW - Silberstiftzeichnung
PY - 2005
SP - 7 pages
PB - Italian Society of Non Destructive Testing
CY - Lecce
AN - OPUS4-7677
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Eichelbaum, M.
A1 - Rademann, K.
A1 - Müller, Ralf
A1 - Radtke, Martin
A1 - Görner, Wolf
T1 - Zur Chemie des Goldes in Silicatgläsern: Untersuchungen zum nicht-thermisch aktivierten Wachstum von Goldclustern
KW - Glas
KW - Goldcluster
KW - Nanophotonik
PY - 2005
DO - https://doi.org/10.1002/ange.200502174
SN - 0044-8249
SN - 0932-2140
SN - 1521-3757
VL - 117
IS - 48
SP - 8118
EP - 8122
PB - Wiley-VCH
CY - Weinheim
AN - OPUS4-7691
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Analysis of trace elements in gold alloys by SR-XRF at high energy at the BAMline
T2 - Ecaart 9 (European conference on accelerators in applied research and technology)
CY - Florence, Italy
DA - 2007-09-03
PY - 2007
AN - OPUS4-16399
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Eichelbaum, M.
A1 - Rademann, K.
A1 - Weigel, W.
A1 - Löchel, B.
A1 - Radtke, Martin
A1 - Müller, Ralf
T1 - Gold-Ruby Glass in a New Light: On the Microstructuring of Optical Glasses with Synchrotron Radiation
KW - Nanoparticles
KW - Glasses
KW - Synchrotron radiation
KW - X-ray lithography
KW - Surface plasmon resonance
KW - Luminescence
PY - 2007
SN - 0017-1557
VL - 40
IS - 4
SP - 1
EP - 5
CY - London
AN - OPUS4-16432
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Reiche, I.
A1 - Riederer, J.
A1 - Riesemeier, H.
T1 - Spatial Resolved Trace Analysis of Dürer's Silver Point Drawings by Means of SR-XRF
T2 - European Conference on Energy Dispersive X-Ray Spectrometry (EDXRS)
CY - Berlin, Germany
DA - 2002-06-16
PY - 2002
SP - 158
AN - OPUS4-1397
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Merchel, Silke
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
A1 - Reiche, I.
A1 - Riederer, J.
A1 - Duval, A.
A1 - Guicharnaud, H.
T1 - Non-Destructive Investigations of Dürer's Silver Point Drawings by Pixe and SY-XRF
T2 - 7th International Conference on Non-destructive testing and Microanalysis for the Diagnostics and Conservation of the Cultural and Environmental Heritage ; art 2002
CY - Antwerp, Belgium
DA - 2002-06-02
PY - 2002
UR - http://srs.dl.ac.uk/arch/publications/reiche/reiche_fullcorr.pdf
SP - 82
AN - OPUS4-1400
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Berger, Achim
A1 - Ecker, Klaus
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Procop, Mathias
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
T1 - X-ray fluorescence analysis at the BAMline
PY - 2002
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2001.pdf#page=253
SN - 0179-4159
SP - 253
EP - 254
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-1322
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
A1 - Reiche, I.
A1 - Riederer, J.
T1 - A closer look at Albrecht Dürer's drawings (1471-1528)
PY - 2002
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/infos/bessy/highlights2001.pdf#page=32
SN - 0179-4159
SP - 32
EP - 33
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-1323
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
A1 - Reiche, I.
A1 - Riederer, J.
T1 - Non-destructive investigations of Dürer's silver point drawings by Sy-XRF
PY - 2002
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2001.pdf#page=292
SN - 0179-4159
SP - 292
EP - 293
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-1324
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Kühbacher, M.
A1 - Weseloh, G.
A1 - Bertelsmann, H.
A1 - Özaslan, M.
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
A1 - Kyriakopoulos, A.
A1 - Behne, D.
T1 - Analysis of metal- and metalloid-containing proteins by SRXRF at the BAMline
N2 - Pilot studies have been carried out at the BAMline at BESSY II in collaboration with the Bundesanstalt
für Materialforschung und -prüfung (BAM) on metal- and metalloid-containing compounds in biological
samples after electrophoretic protein separation. After sodium dodecylsulfate polyacrylamide gel
electrophoresis (SDS-PAGE) and transfer onto a blotting membrane the distribution of selenium among
the proteins of testis homogenate of a rat and a wallaby was determined. The comparison with the
autoradiogram of 75Se-labeled proteins separated in the same way showed that of nine seleniumcontaining
proteins found in rat testis homogenate by autoradiography four could be detected by
synchrotron radiation X-ray fluorescence analysis (SRXRF).
PY - 2003
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2002.pdf#page=333
SN - 0179-4159
SP - 333
EP - 335
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-2495
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Reiche, I.
A1 - Berger, Achim
A1 - Buck, St.
A1 - Görner, Wolf
A1 - Ketelsen, Th.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Riederer, J.
A1 - Riesemeier, Heinrich
T1 - BAMline meets Dürer and van Eyck - Multi-disciplinary investigation of Renaissance silver point drawings by µ-SR-XRF
N2 - - http://www.bessy.de/publications/05.annual_reports/files/AnnualReport2002.pdf -
PY - 2003
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2002.pdf#page=416
SN - 0179-4159
SP - 416
EP - 418
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-2496
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Wilde, L.
A1 - Schneider, M.
A1 - Herein, D.
A1 - Riesemeier, Heinrich
A1 - Radtke, Martin
T1 - XAS measurements on vanadium based compounds at the BAMline
PY - 2003
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2002.pdf#page=215
SN - 0179-4159
SP - 215
EP - 217
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-2490
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Berger, Achim
A1 - Görner, Wolf
A1 - Merchel, Silke
A1 - Procop, Mathias
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
T1 - SY-XRF in certification of a reference material at the BAMline
PY - 2003
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2002.pdf#page=311
SN - 0179-4159
SP - 311
EP - 312
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-2492
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Erste Erfahrungen mit der Röntgenfluoreszenzspektrometrie an der BAMline beim Elektronenspeicherring BESSY II
T2 - 9. Anwendertreffen Röntgenfluoreszenz- und Funkenmissionsspektrometrie
CY - Dortmund, Germany
DA - 2002-03-04
PY - 2002
AN - OPUS4-2990
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Instrumentation for the BESSY micriprobe
T2 - Workshop on "An Application of Microfocus X-Ray Sourses in Material- Enviromental-, Life-Science and Archeometry"
CY - Berlin, Germany
DA - 2002-09-03
PY - 2002
AN - OPUS4-2991
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Kanngießer, B.
A1 - Malzer, W.
A1 - Fuentes Rodriguez, A.
A1 - Reiche, I.
A1 - Voigt, F.
A1 - Radtke, Martin
T1 - 3D micro X-ray fluorescence spectroscopy - combining elemental analysis with chemical speciation
PY - 2004
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2003.pdf#page=495
SN - 0179-4159
SP - 495
EP - 497
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-3513
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Berger, Achim
A1 - Calligaro, T.
A1 - Duval, A.
A1 - Görner, Wolf
A1 - Guerra, M.-F.
A1 - Merchel, Silke
A1 - Radtke, Martin
A1 - Reiche, I.
A1 - Riesemeier, Heinrich
A1 - Roth, M.
T1 - Study of Ag and Au based historical and archaeological objects by high energy Sy-XRF
KW - Synchrotron
KW - XRF analysis
KW - Drawings
KW - Archaeometry
KW - Gold
KW - Röntgenfluoreszenzanalyse
KW - RFA
KW - Zeichnungen
KW - Archäometrie
KW - Albrecht Dürer
KW - gold
PY - 2004
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2003.pdf#page=544
SN - 0179-4159
SP - 544
EP - 546
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-3507
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Wilde, L.
A1 - Radnik, J.
A1 - Schneider, M.
A1 - Herein, D.
A1 - Riesemeier, Heinrich
A1 - Radtke, Martin
T1 - In situ TEY cell for XAS measurements at the BAMline
PY - 2004
UR - http://www.helmholtz-berlin.de/media/media/oea/web/pr_webseite/druckschriften/berichte/bessy/annualreport2003.pdf#page=283
SN - 0179-4159
SP - 283
EP - 285
PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung
CY - Berlin
AN - OPUS4-3508
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Constantinescu, B.
A1 - Oberländer-Târnoveanu, E.
A1 - Bugoi, R.
A1 - Cojocaru, V.
A1 - Radtke, Martin
T1 - The Sarmizegetusa bracelets
N2 - We present the authentication and analysis of these beautiful Dacian bracelets of the first century BC, originally pillaged by treasure hunters and recovered thanks to an international crime chase. They were originally fashioned from gold panned from the rivers or dug from the mines of Transylvania and hammered into the form of coiled snakes. The lack of context is the greatest loss, but a votive purpose is likely given their proximity to the great sacred centre at Sarmizegetusa Regia.
KW - Romania
KW - Sarmizegetusa
KW - Dacian
KW - First century BC
KW - Gold
KW - Bracelets
KW - Hoard
KW - Sacred centre
KW - World heritage site
PY - 2010
UR - http://antiquity.ac.uk/ant/084/ant0841028.htm
SN - 0003-598x
VL - 84
SP - 1028
EP - 1042
PB - Univ. Press
CY - Oxford
AN - OPUS4-23169
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Rodrigues, M.
A1 - Schreiner, M.
A1 - Mäder, M.
A1 - Melcher, M.
A1 - Guerra, M.
A1 - Salomon, J.
A1 - Radtke, Martin
A1 - Alram, M.
A1 - Schindel, N.
T1 - The hoard of Becin - non-destructive analysis of the silver coins
N2 - We report the results of an analytical investigation
on 416 silver-copper coins stemming from the Ottoman
Empire (end of 16th and beginning of 17th centuries), using
synchrotron micro X-ray fluorescence analysis (SRXRF).
In the past, analyses had already been conducted with energy
dispersive X-ray fluorescence analysis (EDXRF), scanning
electron microscopy with energy dispersive X-ray spectrometry
(SEM/EDX) and proton induced X-ray emission spectroscopy (PIXE).With this combination of techniques it was
possible to confirm the fineness of the coinage as well as to
study the provenance of the alloy used for the coins.
For the interpretation of the data statistical analysis
(principal component analysis—PCA) has been performed.
A definite local assignment was explored and significant
clustering was obtained regarding the minor and trace elements
composing the coin alloys.
KW - SRXRF
KW - Silber
KW - Archaeometrie
PY - 2010
DO - https://doi.org/10.1007/s00339-010-5627-y
SN - 0947-8396
VL - 99
IS - 2
SP - 351
EP - 356
PB - Springer
CY - Berlin
AN - OPUS4-23170
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - First images of a colour X-ray camera, a detector with high resolution in energy and space
T2 - Technart 2011
CY - Berlin, Germany
DA - 2011-04-26
PY - 2011
AN - OPUS4-23082
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Nowak, S.H.
A1 - Bjeoumikhov, A.
A1 - Von Borany, J.
A1 - Buchriegler, J.
A1 - Munnik, F.
A1 - Petric, M.
A1 - Radtke, Martin
A1 - Renno, A.D.
A1 - Reinholz, Uwe
A1 - Scharf, O.
A1 - Wedell, R.
T1 - Sub-pixel resolution with a color X-ray camera
N2 - The color X-ray camera SLcam® is a full-field, single photon detector providing scanning-free, energy and spatially resolved X-ray imaging. Spatial resolution is achieved with the use of polycapillary optics guiding X-ray photons from small regions on a sample to distinct energy dispersive pixels on a charged-coupled device detector. Applying sub-pixel resolution, signals from individual capillary channels can be distinguished. Therefore, the SLcam® spatial resolution, which is normally limited to the pixel size of the charge-coupled device, can be improved to the size of individual polycapillary channels. In this work a new approach to a sub-pixel resolution algorithm comprising photon events also from the pixel centers is proposed. The details of the employed numerical method and several sub-pixel resolution examples are presented and discussed.
KW - Color X-ray camera
KW - Sub pixel analysis
PY - 2015
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-334948
DO - https://doi.org/10.1039/c5ja00028a
SN - 0267-9477
SN - 1364-5544
SP - 1890
EP - 1897
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-33494
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Nowak, S.H.
A1 - Bjeoumikhov, A.
A1 - Von Borany, J.
A1 - Buchriegler, J.
A1 - Munnik, F.
A1 - Petric, M.
A1 - Renno, A.D.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Scharf, O.
A1 - Strüder, L.
A1 - Wedell, R.
A1 - Ziegenrücker, R.
T1 - Examples of XRF and PIXE imaging with few microns resolution using SLcam® a color X-ray camera
N2 - We present results of recent development of the color X-ray camera, type SLcam®, allowing detection of X-ray images with few microns resolution. Such spectral resolution is achieved with the use of high-quality polycapillary optics combined with sub-pixel resolution. Imaging of Siemens star resolution test chart reveals that the resolution limit of SLcam® can go down to nearly 5µm. Several real sample examples of measurements carried out at the laboratory, synchrotron, and particle-induced X-ray emission beamlines are shown. This is the first time SLcam® is used as particle-induced X-ray emission detector.
KW - X-ray
KW - Color X-ray camera
KW - CXC
KW - Synchrotron radiation
KW - BESSY
KW - BAMline
PY - 2015
DO - https://doi.org/10.1002/xrs.2590
SN - 0049-8246
VL - 44
IS - 3
SP - 135
EP - 140
PB - Wiley & Sons, Ltd.
CY - Chichester
AN - OPUS4-33170
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Radtke, Martin
A1 - Buzanich, Günter
A1 - Curado, Jessica
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Scharf, O.
T1 - Slicing - a new method for non destructive 3D elemental sensitive characterization of materials
N2 - Recent advances in synchrotron sources and detector technology have led to substantial improvements in spatial resolution and detection limits for X-ray fluorescence analysis (XRF). However, the non-destructive three-dimensional elemental sensitive characterization of samples remains a challenge. We demonstrate the use of the so-called 'Color X-ray Camera' (CXC) for 3D measurements for the first time. The excitation of the sample is realized with a thin sheet-beam. The stepwise movement of the sample allows getting the elemental distribution for each layer with one measurement. These layers can be combined to a full 3D dataset for each element afterwards. Since the information is collected layer by layer, there is no need to apply reconstruction techniques, which quite often are the reason for artifacts in the results achieved by computed tomography (CT). The field of applications is wide, as the 3D elemental distribution of a material contains clues to processes inside the samples from a variety of origins. The technique is of special interest and well suited for biological specimens, because their light matrix minimizes restricting absorption effects. Measurement examples of a hornet and the teeth of a Sorex araneus are shown.
KW - SR-microXRF
KW - 3D
KW - CXC
PY - 2014
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-324330
DO - https://doi.org/10.1039/c4ja00085d
SN - 0267-9477
SN - 1364-5544
VL - 29
IS - 8
SP - 1339
EP - 1344
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-32433
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Shading Effects in SR-TXRF: Calcullations and Experimental Visualization using a Color X-ray Camera
T2 - Denver X-ray Conference
CY - BIG SKY RESORT, BIG SKY, MONTANA, USA
DA - 2014-07-28
PY - 2014
AN - OPUS4-32386
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
A1 - Stalinski, T.
T1 - Adaptive Kanalreduktion eines hyperspektralen Bilddatensatzes kombiniert mit k-mean Clustering
T2 - Workshop Farbbildverarbeitung - Wuppertal 2014
CY - Wuppertal
DA - 2014-09-25
PY - 2014
AN - OPUS4-32365
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - 3D and Beyond - Basics and Applications of the Color X-ray Camera
T2 - Denver X-ray Conference
CY - BIG SKY RESORT, BIG SKY, MONTana, USA
DA - 2014-07-28
PY - 2014
AN - OPUS4-32366
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Röntgenfluoreszenzanalyse mit Synchrotronstrahlung an der Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin
T2 - Seminar "Strahlenphysikalische Anwendungen in Technik und Medizin"
CY - Wien (Österreich)
DA - 2014-01-14
PY - 2014
AN - OPUS4-32367
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Slicing - A New Method For Non Destructive 3D Elemental Sensitive Characterization Of Materials
T2 - Digital Speciman 2014
CY - Berlin
DA - 2014-09-08
PY - 2014
AN - OPUS4-32368
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Detection of platinum in gold with D2XRF
T2 - SR2A 2014
CY - Paris (Frankreich)
DA - 2014-09-09
PY - 2014
AN - OPUS4-32369
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Double Dispersive X-ray Fluorescence
T2 - EXRS 2014
CY - Bologna (Italien)
DA - 2014-06-15
PY - 2014
AN - OPUS4-32370
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
A1 - Fittschen, U. E. A.
T1 - Shading Effects in SR-TXRF: Calculations and Experimental Visualization using a Color X-ray Camera
T2 - Denver X-ray Conference
CY - BIG SKY RESORT, BIG SKY, MONTANA, USA
DA - 2014-07-28
PY - 2014
AN - OPUS4-32371
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Tissot, I.
A1 - Troalen, L.G.
A1 - Manso, M.
A1 - Ponting, M.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Barreiros, M. A.
A1 - Shaw, I.
A1 - Carvalho, M.L.
A1 - Guerra, M.F.
T1 - A multi-analytical approach to gold in Ancient Egypt: Studies on provenance and corrosion
N2 - Recent results from a three-year multi-disciplinary project on Ancient Egyptian gold jewellery revealed that items of jewellery from the Middle Kingdom to the New Kingdom were manufactured using a variety of alluvial gold alloys. These alloys cover a wide range of colours and the majority contain Platinum Group Elements inclusions. However, in all the gold foils analysed, these inclusions were found to be absent. In this work a selection of gilded wood and leather items and gold foil fragments, all from the excavations by John Garstang at Abydos (primarily from Middle Kingdom graves), were examined using Scanning Electron Microscopy-Energy Disperse Spectroscopy (SEM-EDS), X-Ray Fluorescence (µXRF), Particle Induced X-Ray Emission (µPIXE) and Double Dispersive X-Ray Fluorescence (D²XRF). The work allowed us to characterise the composition of the base-alloys and also to reveal the presence of Pt at trace levels, confirming the use of alluvial gold deposits. Corrosion products were also investigated in the foils where surface tarnish was visually observed. Results showed that the differences in the colour of corrosion observed for the foils are related not only to the thickness of the corrosion layer but also to a multi-layer structure containing the various corrosion products.
KW - Gold
KW - Egypt
KW - PGE
KW - Provenance
KW - Corrosion
KW - muXRF
KW - muPIXE
KW - D2XRF
KW - SEM-EDS
PY - 2015
DO - https://doi.org/10.1016/j.sab.2015.03.012
SN - 0584-8547
SN - 0038-6987
VL - 108
SP - 75
EP - 82
PB - Elsevier
CY - Amsterdam
AN - OPUS4-33155
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Analysis of ancient gold objects with SRXRF at the BAMline
T2 - Technart 2015
CY - Catania, Italien
DA - 2015-04-27
PY - 2015
AN - OPUS4-34007
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Experiences with the Color X-Ray Camera at the BAMline
T2 - X-ray Spectroscopy Detectors for Present and Future Synchrotron Storage rings: Opportunities for Horizon 2020
CY - Paris, Frankreich
DA - 2015-03-16
PY - 2015
AN - OPUS4-34009
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Röntgenfluoreszenzanalyse mit Synchrotronstrahlung an der Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin
T2 - Seminar: "Strahlenphysikalische Anwendungen in Technik und Medizin"
CY - Wien, Österreich
DA - 2015-01-14
PY - 2015
AN - OPUS4-34014
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Imaging with the Color X-ray Camera - Basics and Examples
T2 - HZB Industry Workshop
CY - Berlin
DA - 2015-02-19
PY - 2015
AN - OPUS4-34023
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Vogel, Christian
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Schäfers, F.
A1 - Adam, Christian
T1 - Chemical state of chromium, sulfur, and iron in sewage sludge ash based phosphorus fertilizers
N2 - As an essential element of all life forms, phosphorus (P) is vital to the fertilizer industry. With decreasing quantity and quality of phosphate rock resources, recycling P-fertilizers from wastewater is of increasing interest. The P-fertilizer products of a recently developed thermochemical process for P recovery from sewage sludge ash (SSA) were investigated by chromium, sulfur, and iron K-edge X-ray near-edge structure (XANES) spectroscopy. This paper focuses the formation and prevention of toxic chromium(VI) and toxic sulfides during the thermochemical processes. Reducing conditions prevent the oxidation of chromium(III) in the SSA to toxic chromium(VI). Sulfides formed under the reducing conditions are nontoxic iron sulfides. Hematite (Fe2O3) present in the SSA is reduced to magnetite (Fe3O4). A gentle post-treatment at 400 °C under oxidizing conditions converts the iron sulfides into plant-available iron sulfates. This oxidative post-treatment does not form undesired chromium(VI) compounds.
KW - X-ray absorption near-edge structure (XANES) spectroscopy
KW - Phosphorus recovery
KW - Sewage sludge ash
KW - Chromium
KW - Sulfur
KW - Iron
PY - 2015
DO - https://doi.org/10.1021/acssuschemeng.5b00678
SN - 2168-0485
VL - 3
IS - 10
SP - 2376
EP - 2380
PB - ACS Publ.
CY - Washington, DC
AN - OPUS4-34166
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Fittschen, U.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Böttger, S.
A1 - Rosenberg, D.
A1 - Menzel, M.
A1 - Jensen, W.
A1 - Busker, M.
A1 - Gotlib, Z.
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
A1 - Wobrauschek, P.
A1 - Streli, C.
ED - de Oliveira Guilherme Buzanich, Ana
T1 - A setup for synchrotron-radiation-induced total reflection X-ray fluorescence and X-ray absorption near-edge structure recently commissioned at BESSY II BAMline
N2 - An automatic sample changer chamber for total reflection X-ray fluorescence (TXRF) and X-ray absorption near-edge structure (XANES) analysis in TXRF geometry was successfully set up at the BAMline at BESSY II. TXRF and TXRF-XANES are valuable tools for elemental determination and speciation, especially where sample amounts are limited (<1 mg) and concentrations are low (ng ml⁻¹ to μg ml⁻¹). TXRF requires a well defined geometry regarding the reflecting surface of a sample carrier and the synchrotron beam. The newly installed chamber allows for reliable sample positioning, remote sample changing and evacuation of the fluorescence beam path. The chamber was successfully used showing accurate determination of elemental amounts in the certified reference material NISTwater 1640. Low limits of detection of less than 100 fg absolute (10 pg ml⁻¹) for Ni were found. TXRF-XANES on different Re species was applied. An unknown species of Re was found to be Re in the +7 oxidation state.
KW - TXRF
KW - TXRF-XANES
KW - Sample changer
KW - BAMline
KW - Re-XANES
PY - 2016
DO - https://doi.org/10.1107/S1600577516001995
SN - 1600-5775
VL - 23
IS - 3
SP - 820
EP - 824
PB - International Union of Crystallography
AN - OPUS4-38656
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Hahn, Oliver
A1 - Denker, A.
A1 - Merchel, S.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Wolff, T.
ED - Armbruster, B.
ED - Eilbracht, H.
ED - Hahn, Oliver
ED - Heinrich-Tamaska, O.
T1 - Zerstörungsfreie Analyse von Metallartefakten - Eine Fallstudie
N2 - Die naturwissenschaftliche Analyse historischer Materialen ermöglicht die Beantwortung kulturhistorischer Fragestellungen, die mit kunsthistorischen oder archäologischen Ansätzen allein nicht zu leisten sind. In dieser Studie wurden sechs römische Münzen mit unterschiedlich stark ausgeprägten Korrosionsschichten an unbehandelten und polierten Stellen mit vier zerstörungsfreien analytischen Methoden untersucht: Hoch- und Niederenergie Protonen Induzierter Röntgenemission (HE-/PIXE), Synchrotronstrahlungsinduzierte-Röntgenfluoreszenzanalyse (SY-RFA) und Mikro-Röntgenfluoreszenzanalyse (Mikro-RFA) mit einem mobilen Gerät. Aufgrund von Unterschieden in den Messbedingungen und dem Einfluss der Patina-Schichten auf diese ergaben sich nur für wenige Elemente Übereinstimmungen in den quantitativen Daten. Zur Validierung zukünftiger Messkampagnen mit verschiedenen Methoden sind daher Vergleichstudien unerlässlich.
N2 - Investigations of physical properties and chemical composition of ancient materials generate important data for answering culture-historical questions that cannot be solved by art historical and archaeological methods alone. This contribution reports on the analysis of six Roman coins, with different degrees of corrosion layers in parts that were not handled or polished, using four non-destructive methods: low-energy particle-induced X-ray emission (PIXE, 2 MeV), high-energy PIXE (68 MeV), μ-X-ray fluorescence (XRF) spectrometry with a portable device and synchrotron-radiation induced XRF. Because of differences in the conditions needed for measurement and the influence of the layers of patina on these measurements, there were few elements where the quantitative data were in agreement. Thus comparative analyses are essential to validate future measurement projects using different methods.
KW - Zerstörungsfreie Prüfung
KW - Protoneninduzierte Röntgenemission
KW - Röntgenfluoreszenzanalyse
KW - Non-destructive testing
KW - Particle-induced X-ray emission
KW - X-ray fluorescence analysis
PY - 2016
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-385702
SN - 978-3-9816751-5-3
VL - Berlin studies of the ancient world, Band 35
SP - 117
EP - 137
PB - Edition Topoi
CY - Berlin
AN - OPUS4-38570
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Rauwolf, M.
A1 - Turyanskaya, A.
A1 - Roschger, A.
A1 - Prost, J.
A1 - Simon, R.
A1 - Scharf, O.
A1 - Radtke, Martin
A1 - Schoonjans, Tom
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Klaushofer, K.
A1 - Wobrauschek, P.
A1 - Hofstaetter, J. G.
A1 - Roschger, P.
A1 - Streli, C.
T1 - Synchrotron radiation micro X-ray fluorescence spectroscopy of thin structures in bone samples: comparison of confocal and color X-ray camera setups
N2 - In the quest for finding the ideal synchrotron-radiation-induced imaging method for the investigation of trace element distributions in human bone samples, experiments were performed using both a scanning confocal synchrotron radiation micro X-ray fluorescence (SR-mXRF) (FLUO beamline at ANKA) setup and a full-field color X-ray camera (BAMline at BESSY-II) setup. As zinc is a trace element of special interest in bone, the setups were optimized for its detection. The setups were compared with respect to count rate, required measurement time and spatial resolution. It was demonstrated that the ideal method depends on the element of interest. Although for Ca (a major constituent of the bone with a low energy of 3.69 keV for its K alpha XRF line) the color X-ray camera provided a higher resolution in the plane, for Zn (a trace element in bone) only the confocal SR-µXRF setup was able to sufficiently image the distribution.
KW - Synchrotron
KW - BAMline
KW - BESSY
KW - XRF
KW - X-ray Color Camera
PY - 2017
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-391944
DO - https://doi.org/10.1107/S1600577516017057
SN - 1600-5775
VL - 24
SP - 307
EP - 311
PB - International Union of Crystallography
AN - OPUS4-39194
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Strüder, L.
A1 - Hartmann, R.
A1 - Holl, P.
A1 - Ihle, S.
A1 - Huth, M.
A1 - Schmidt, J.
A1 - Tham, Ch.
A1 - Kanngießer, B.
A1 - Baumann, J.
A1 - Renno, A.
A1 - Grenzer, J.
A1 - Radtke, Martin
A1 - Abboud, A.
A1 - Pietsch, U.
A1 - Soltau, H.
T1 - High Speed, High Resolution imaging spectrometers based on pnCCDs for XRF and XRD applications
N2 - For many years pnCCDs have been well known as X-ray detectors for spectroscopic imaging in many fields of science: X-Ray Fluorescence analysis (XRF), X-ray Diffraction (XRD) with light sources in large accelerator facilities as well as with laboratory light sources or with X-rays from celestial sources in X-ray astronomy. A brief introduction in GEXRF (Grazing Emission XRF) measurements with a laboratory laser produced plasma source will be given, PIXE (Particle Induced X-ray Emission) measurements and D2XRF (Double Dispersive X-Ray Fluorescence) and Slicing experiments with pnCCDs coupled to polycapillary optics performed at the BESSY synchrotron will be shown. Energy-dispersive Laue diffraction with ultra-hard X-rays for the analysis of defects in metals will conclude the overview of spectroscopic X-ray imaging measurements in the field of structure and dynamics of matter.
KW - PnCCD
KW - Synchrotron
KW - XRF
PY - 2016
DO - https://doi.org/10.1017/S1431927616001355
VL - 22
IS - S3
SP - 100
EP - 101
AN - OPUS4-38884
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - First in situ measurements with a newly developed SR-based ‘Single-shot‘ EXAFS set-up
N2 - The newly developed EXAFS set-up comprises both time- and spatially-resolved EXAFS information simultaneously in a single-shot. This facile, stable and scanningless set-up was tested at the BAMline @ BESSY-II (Berlin, Germany). The primary broadband beam is generated by a filter/X-ray-mirror combination (bandpass). The transmitted beam through the sample is diffracted by a convexly bent Si (111) crystal, producing a divergent beam. This, in turn, is collected by an area sensitive detector based on a CCD camera, in a theta - 2 theta geometry.
The first in situ measurements were successfully carried out and hereby presented. The case-study involved a well known reaction, in which structural changes are induced over time, and continuously measured. We were able to track structural changes within a 1s time resolution.
T2 - European Conference on X-Ray Spectrometry (EXRS)
CY - Gothenburg, Sweden
DA - 19.06.2016
KW - Synchrotron
KW - BAMline
KW - EXAFS
PY - 2016
AN - OPUS4-38807
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Following Pt in gold Byzantine tesserae: towards provenance and chronology with SR-XRF
N2 - Gold mosaics, made from gold and glass, are one of the best expressions of Late Antique Byzantine and Early Islamic art. The gold alloys, whose composition seems to indicate that gold coins were re-used to fabricate the tesserae, can be used to provide information on the mosaics chronology. Monetary Byzantine gold is in fact characterized by the presence of Pt, which contents in the gold alloy change over time, but Pt must be measured in 0.2-0.4 µm thickness gold leaves that were beaten to be sandwiched between two glass layers.
To analyze this samples the D²XRF set-up at the BAMline at the BESSY synchrotron in Berlin was used. The combination of a crystal for wavelength dispersion and an energy resolving single photon counting pnCCD allows the realization of this very simple wavelength dispersive detection system. With this system an MDL of 1 μg/g for the determination of Pt in Au under optimal conditions can be reached.
Gold leaf tesserae from nine archaeological sites, covering the period that goes from the 5th c. to the 8th c., were analyzed. The presence of Pt in the majority of the samples confirmed the re-use of coins. The Pt contents separate the samples in three groups, one of which having the same chemical characteristics as the Byzantine gold could be compared to dated coins for chronology. The higher Pt contents for one of other groups suggest
T2 - Synchrotron Radiation and Neutrons in Art & Archaeology (SR2A)
CY - Chicago, USA
DA - 06.09.2016
KW - Synchrotron
KW - BAMline
KW - XRF
KW - Archaeometry
KW - D2XRF
PY - 2016
AN - OPUS4-38808
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Es ist nicht alles Gold was glänzt - Die Analyse von Gold mit Synchrotronstrahlung
N2 - Gold ist eines der sieben schon im Altertum bekannten Metalle und wurde wg. seines Glanzes und seiner Seltenheit von alters her als Tauschmittel und zur Herstellung von Schmuck benutzt. Außerdem ist es einfach bearbeitbar und weitestgehend gegen chemische Einflüsse resistent.
Die Untersuchungen von Gold mit synchrotronstrahlungsangeregter Röntgenfluoreszenzanalyse sind zerstörungsfrei und geben Auskunft über die in der untersuchten Probe vorhandenen chemischen Elemente.
Bei den hier vorgestellten Untersuchungen an der BAMline stehen Fragestellungen wie Herkunft, Herstellungsverfahren und Zusammengehörigkeit von Goldfunden im Vordergrund. Die verschiedenen Fragestellungen werden an einer Reihe von Beispielen erläutert die vom Wikingerschatz aus Hiddensee über die Himmelsscheibe von Nebra bis hin zu Funden aus Ägypten langen. Zusätzlich werden die modernen Messmethoden vorgestellt, die am Synchrotron heutzutage zur Verfügung stehen.
T2 - Vortragsreihe „Naturwissenschaftliche Einsichten in Kunst- und Kulturgut"
CY - Dresden, Germany
DA - 13.10.2016
KW - Synchrotron
KW - BAMline
KW - Gold
KW - XRF
PY - 2016
AN - OPUS4-38809
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Von Ägypten bis Hiddensee – Analyse von Gold mit Synchrotronstrahlung
N2 - Gold ist eines der sieben schon im Altertum bekannten Metalle und wurde wg. seines Glanzes und seiner Seltenheit von alters her als Tauschmittel und zur Herstellung von Schmuck benutzt. Außerdem ist es einfach bearbeitbar und weitestgehend gegen chemische Einflüsse resistent.
Die Untersuchungen von Gold mit synchrotronstrahlungsangeregter Röntgenfluoreszenzanalyse sind zerstörungsfrei und geben Auskunft über die in der untersuchten Probe vorhandenen chemischen Elemente.
Bei den hier vorgestellten Untersuchungen an der BAMline stehen Fragestellungen wie Herkunft, Herstellungsverfahren und Zusammengehörigkeit von Goldfunden im Vordergrund. Die verschiedenen Fragestellungen werden an einer Reihe von Beispielen erläutert die vom Wikingerschatz aus Hiddensee über die Himmelsscheibe von Nebra bis hin zu Funden aus Ägypten langen. Zusätzlich werden die modernen Messmethoden vorgestellt, die am Synchrotron heutzutage zur Verfügung stehen.
T2 - Vorlesung FU Berlin Einführung in die Archäometrie
CY - Berlin, Germany
DA - 04.11.2016
KW - Synchrotron
KW - BAMline
KW - Gold
KW - XRF
PY - 2016
AN - OPUS4-38810
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The Colour X-ray Camera – Basics and Applications of a 2D X-ray Detector
N2 - The Color X-ray Camera CXC or SLcam® is an energy-resolving X-ray camera capable of energy- and space-resolved measurements. It consists of a high-speed CCD detector coupled to a polycapil-lary optic that conducts the X-ray photons from the probe to distinct pixels onto the detector.
The camera is capable of fast acquisition of spatially and energy resolved fluorescence images. A dedicated software enables the acquisition and the online processing of the spectral data for all 69696 pixels, leading to a real-time visualization of the elements distribution in a sample. It was developed in a joint project with BAM, IFG Berlin and PN Sensors.
In this contribution we will mainly discuss the use of the CXC at our beamline, the BAMline at BESSY II and imaging applications of the CXC from different areas, like biology and archaeometry. Additionally new developments for the use of the detector without optics, like wavelength dispersive detection or 1shot-XANES, will be presented.
T2 - Seminar Strahlenphysikalische Anwendungen in Technik und Medizin
CY - Wien, Austria
DA - 20.01.2016
KW - Synchrotron
KW - BAMline
KW - XRF
PY - 2016
AN - OPUS4-38811
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Investigation on fire gilding using XRF and NAA
N2 - Fire-gilding or amalgam gilding is a historical technique for the gilding of objects. The object to be gilded is coated with an amalgam (a solution of gold (Au) in mercury (Hg)). By heating, the largest part of the Hg is subsequently evaporated and there remains a gold layer, containing still detectable amounts of Hg.
The information on the used gilding technique might be crucial for the conservation and preservation of archaeological objects. Therefore, the main objective of this work is the detailed understanding of the behaviour of Hg under conditions of fire gilding. I.e. the understanding of the diffusion and evaporating behaviour of Hg, depending on parameters like substrate material (silver, copper, bronze, brass...), heating temperature and duration, and the resulting Hg depth profiles under these conditions. Secondary objective is the establishment of a measurement protocol for the unambiguous identification of different types of gilding, based solely on non-destructive methods, which can be applied to historical samples.
In a first step, fire-gilded samples have been prepared on Cu and Ag sheet metal, respectively. Some of the gildings were produced by a professional goldsmith; another set of samples was produced under laboratory conditions. These samples have been examined with NAA (neutron activation analysis) and SR-XRF (synchrotron radiation induced X-ray fluorescence). First results of these measurements will be presented and discussed.
T2 - Synchrotron Radiation and Neutrons in Art & Archaeology (SR2A)
CY - Chicago, IL, USA
DA - 06.09.2016
KW - Synchrotron
KW - BAMline
KW - XRF
KW - Archaeometry
PY - 2016
AN - OPUS4-38766
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Emmerling, Franziska
ED - de Oliveira Guilherme Buzanich, Ana
T1 - Time- and spatial-resolved X-ray absorption fine structure (XAFS) spectroscopy in a single-shot: new analytical possibilities for in situ material characterization
N2 - A new concept that comprises both time- and lateral-resolved X-ray absorption fine-structure information simultaneously in a single shot is presented. This uncomplicated set-up was tested at the BAMline at BESSY-II (Berlin, Germany). The primary broadband beam was generated by a double multilayer monochromator. The transmitted beam through the sample is diffracted by a convexly bent Si (111) crystal, producing a divergent beam. This, in turn, is collected by either an energy-sensitive area detector, the so-called color X-ray camera, or by an area-sensitive detector based on a CCD camera, in θ-2θ geometry. The first tests were performed with thin metal foils and some iron oxide mixtures. A time resolution of lower than 1 s together with a spatial resolution in one dimension of at least 50 µm is achieved.
KW - Single-shot XAFS
KW - Time resolution
KW - Spatial resolution
KW - Divergent XAFS
PY - 2016
DO - https://doi.org/10.1107/S1600577516003969
SN - 1600-5775
VL - 23
SP - 769
EP - 776
PB - International Union of Crystallography
AN - OPUS4-38370
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Niemeyer, B.
A1 - Schwarzmaier, A.
A1 - Radtke, Martin
A1 - Hahn, Oliver
T1 - Archaische Goldarbeiten aus Kleinasien in der Berliner Antikensammlung – Herstellungstechnik, Materialanalytik und der Fundkomplex »aus Ephesos«
N2 - Ein Konvolut einzelner Schmuckstücke und die Goldbeigaben eines angeblichen Grabfundes wurden technologisch und analytisch untersucht. Die meisten Objekte sind Blecharbeiten, die aus einer Vielzahl von Einzelteilen mit metallischem Goldlot zusammengefügt und mit Granulation oder granulations-imitierendem Perl- oder Kerbdraht verziert wurden. Nur vier kleine Ohrringe sind massiv gegossen.
Zwei Zierbleche dürften über Patrizen (Positivmodeln), die Deckel der Astragale in Matrizen (Negativmodeln) geformt worden sein. Alle Objekte wurden mit Synchrotron- und atmosphärischer Röntgenfluoreszenz analysiert. Die Daten zeigen das breite Spektrum an Goldlegierungen, die im 7./6. Jahrhundert v. Chr. in Kleinasien verarbeitet wurden: vom natürlichen Seifengold (Elektrum) bis zu geläutertem, fast reinem Gold. Eine Korrelation zwischen Goldqualität und Verarbeitungsmethode konnte nicht festgestellt werden. Sowohl hochreines als auch mit viel Silber und Kupfer legiertes Gold wurde zum Schmieden von Blecharbeiten, aber auch zum Massivguss verwendet. Aus der Goldfarbe kann wegen des Phänomens der oberflächlichen Goldanreicherung nicht auf eine Legierungszusammensetzung geschlossen werden. Der 1963 angekaufte Fundkomplex aus lydischen Metallarbeiten und ostionischen Salbgefäßen aus Ton dürfte einen Grabfund des frühen 6. Jahrhunderts v. Chr. darstellen, dessen Herkunft aus Ephesos jedoch nicht zu sichern ist.
KW - Gold
KW - Synchrotron
KW - XRF
PY - 2017
SN - 1866-7007
VL - 9
SP - 57
EP - 83
PB - RGZM. Archäologische Staatssammmlung München
CY - München
AN - OPUS4-42986
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Aldrabee, A.
A1 - Wriekat, A.
A1 - Abu Saleem, K.
A1 - Radtke, Martin
T1 - Non-destructive SR-XRF analysis of ancient Mamluk-Ayyubid glazed pottery fragments from Karak Castle, Jordan
N2 - Sixteen Ayyubid-Mamluk glazed pottery sherds were analyzed in order to identify and characterize the elemental composition to determine their provenance. The tested sherds were collected from the historical site of Karak Castle, southern Jordan.
Chemical analysis for the sixteen samples has been carried out using Synchrotron Radiation X-ray Fluorescence Spectrometry (SR-XRF) Technique. Furthermore, the semiquantitative analysis of the elements Fe – Cu – Zn – Br – Rb – Sr – Y – Zr – Nb – Mo – Pd – Ag – Cd and Pb has been performed for the samples based on Principal Component Analysis (PCA) and hierarchical Cluster Analysis with Bray-Curtis in order to define grouping of different glazed pottery by obtaining information on their similarity and clustering. The results of chemical analysis provided persuasive evidence that the Karak Castle pottery sherds have at least three different sources of provenance.
KW - BAMline
KW - Karak Castle
KW - Synchrotron
KW - XRF
PY - 2015
VL - 8
IS - 3
SP - 157
EP - 163
AN - OPUS4-43489
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Zur Röntgenfluoreszenzanalyse von Kulturgütern - Von Nebra bis Ägypten
N2 - Im Vortag werden die Möglichkeiten der Synchrotronstrahlungsinduzierten Röntgenfluoreszenzanalayse (SRXRF) dargestellt. Insbesondere werden bei einer Reihe von Beispielen die Vorteile der SRXRF erläutert und der mögliche Einsatz eines portablen Messgeräts für die Analse von Glas diskutiert.
T2 - Workshop: Ritter, Goethe, ihre Prismen und die Polarität
CY - Jena, Germany
DA - 19.05.2017
KW - Gold
KW - Synchrotron
KW - XRF
KW - BESSY
KW - Archeometry
KW - BAMline
PY - 2017
AN - OPUS4-42976
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The Bernstorf Gold - A challenge to the flexibility of SRXRF
N2 - The gold finds from Bernstorf, in the Freising district of Bavaria, were discovered in 1998, in the area of a Bronze Age settlement. First analyses with X-ray fluorescence (XRF) revealed gold of an unusually high purity grade, which was explained by using cementation techniques.
A newer analysis with laser ablation inductively coupled plasma mass spectrometry (LA–ICP–MS) indicated an even higher purity. These analytical results were the starting point of an ongoing discussion. The amount and type of the detected contaminants were highly controversial and led to contradictory interpretations.
We reanalysed 11 gold samples with synchrotron radiation induced X-ray fluorescence (SRXRF) at the BAMline at BESSY-II. To reach the desired detection limits a thorough analysis with three different excitation energies and detection conditions were applied to confirm or disprove the previous results.
In this contribution we will get into the details for the need of the different measurement conditions and the virtues of the use of synchrotron radiation. The use and effectiveness of cementation techniques will be addressed. Finally we will present the achieved results and their impact on the discussion.
T2 - ICXOM 24
CY - Trieste, Italy
DA - 25.10.2017
KW - Gold
KW - Synchrotron
KW - XRF
KW - BESSY
KW - Archeometry
PY - 2017
AN - OPUS4-42977
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - TXRF and XANES at the BAMline
N2 - The BAMline at the synchrotron BESSY II in Berlin supplies users with up to date analytical x-ray methods for the energy range between 5 and 50 keV. Additional to XRF with micron Resolution it provides amongst other things the possibility to use TXRF and XANES. Especially the use of
the so-called Color X-Ray Camera (CXC) opens the possibility to use new and effective detection schemes, which allow to measure simultaneously distributions of elements or Absorption spectra in a motionless mode.
In this talk the analytical possibilities at the BAMline for samples with biological Background will be introduced. The available methods will be presented and discussed for various examples.
A perspective for the future use for XANES in grazing emission and TXRF geometries for plant materials will be given.
T2 - TXRF 2017
CY - Brescia, Italy
DA - 19.09.2017
KW - XANES
KW - Synchrotron
KW - XRF
KW - BESSY
PY - 2017
AN - OPUS4-42978
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Von der Antike in die Zukunft: Materialanalyse mit Synchrotronstrahlung
N2 - Die Eigenschaften und die Verlässlichkeit von Materialien jeglicher Art sind seit jeher die Grundlagen der Technik einer Gesellschaft. Tiefgreifende Kenntnisse über sie sind deshalb eine Voraussetzung um neue Produkte zu entwickeln, Verlässlichkeit zu gewährleisten, oder aber auch, wie in der Archäometrie, Kenntnisse über die Vergangenheit zu gewinnen. Ein Schlüssel zum Verständnis ist das Wissen über die chemische Zusammensetzung und die Struktur von Materialien Die Analyse mit Synchrotronstrahlung bietet hierfür herausragende Werkzeuge an, die zerstörungsfrei und hochsensitiv sind. Mit Röntgenfluoreszenzanalyse kann die elementare Zusammensetzung in winzigen Proben bis auf μg/g bestimmt werden. Anwendungsbeispiele aus verschiedenen Themengebieten, aber besonders von archäologischen Fragestellungen wie z.B. dem Goldfund von Bernstorf werden im Vortrag vorgestellt.
T2 - Berliner Industriegespräch
CY - Berlin, Germany
DA - 05.04.2017
KW - Gold
KW - Synchrotron
KW - XRF
KW - BESSY
KW - Archeometry
KW - BAMline
PY - 2017
AN - OPUS4-42979
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - News from the BAMline
N2 - In this talk, the newest developments at the BAMline and examples of applications are presented.
T2 - Seminar: STRAHLENPHYSIKALISCHE ANWENDUNGEN IN TECHNIK UND MEDIZIN
CY - Vienna, Austria
DA - 18.01.2017
KW - XANES
KW - Synchrotron
KW - XRF
KW - BESSY
PY - 2017
AN - OPUS4-42981
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Gebhard, R.
T1 - Synchrotron radiation–induced X-ray fluorescence (SRXRF) analyses of the Bernstorf Gold
N2 - The gold finds from Bernstorf, in the Freising district of Bavaria, were discovered in 1998, in the area of a Bronze Age settlement. First analyses with X-ray fluorescence (XRF) revealed gold of an unusually high purity grade, which was explained by the use of cementation techniques. A newer analysis with laser ablation inductively coupled plasma mass spectrometry (LA–ICP–MS) indicated an even higher purity. The analytical results were the starting point of an ongoing discussion. In this study, we re-analysed 11 gold samples with Synchrotron radiation–induced X-ray fluorescence at the BAMline at BESSY. In a thorough analysis, different excitation and detection conditions were applied to confirm or disprove the previous results. It was shown that the purity of the gold from the specimen is higher than 99.9%. The main impurities are silver in a range between 20 and 200 μg/g and copper between 1 and 10 μg/g. The results are in very good agreement with the LA–ICP–MS measurements and provide basic information for discussions about provenance, processing techniques or considerations of authenticity.
KW - Gold
KW - Synchrotron
KW - XRF
KW - BESSY
KW - Archeometry
PY - 2017
DO - https://doi.org/10.1111/arcm.12294
SN - 0003-813X
SN - 1475-4754
VL - 59
IS - 5
SP - 891
EP - 899
PB - Wiley
AN - OPUS4-42540
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Guerra, M. F.
A1 - Fischer, M.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
T1 - Inca figurines from the Ethnologisches Museum in Berlin: an analytical study of some typical and atypical productions
N2 - Fourteen hollow and one cast anthropomorphic and zoomorphic figurines produced in Incan times for ritual offerings from the Ethnologisches Museum in Berlin were selected to investigate the technologies and alloys used for their fabrication with portable optical microscopy and non-destructive XRF elemental analysis. This group of gold and silver figurines includes typical specimens of the Inca production, such as the four silver figurines from the Island Coati in Lake Titicaca and the two gold figurines from Pachacamac, as well as specimens that are seldom present in collections, which makes them atypical. In addition to the tall figurines with atypical hair or standing pose, one bicolour figurine half silver, half gold) and another with coloured inlays were included in this study for comparison. The large majority of the silver specimens are made from very high quality alloys and the gold figurines are made from alloys containing low copper contents and silver ranging from 30wt% to 52wt%.
KW - Gold
KW - pXRF
KW - Inca
PY - 2017
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-436015
DO - https://doi.org/10.4000/bifea.8232
SN - 0303-7495
VL - 46
IS - 1
SP - 221
EP - 251
PB - Institut Français d'Études Andines
AN - OPUS4-43601
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Curado, Jessica
A1 - Radtke, Martin
A1 - Buzanich, Günter
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Guttler, R.A.S.
A1 - Rizzutto, M.A.
T1 - μ-SRXRF characterization of Brazilian emeralds
N2 - The aim of the present study is to characterize emeralds from different mines of Brazil by using Synchrotron Radiation X-ray Fluorescence Microanalysis (µ-SRXRF). The advantage of this technique is that we can analyze a homogeneous, inclusion free area of the stone with the microbeam to distinguish the elemental fingerprint according to the provenance of the emerald. A total of 47 samples belonging to 5 different Brazilian mines were studied in this work and 28 elements were identified. By means of Principal Component Analysis (PCA) it is possible to build different groups according to the provenance of the stones, which allows to assign samples of unknown origin to the according mine.
T2 - 22nd International congress on X-ray optics and microanalysis
CY - Hamburg, Germany
DA - 02.09.2013
KW - µ-SRXRF
KW - BAMline
KW - Emeralds
KW - Geoscience
PY - 2014
DO - https://doi.org/10.1088/1742-6596/499/1/012016
SN - 1742-6588
SN - 1742-6596
VL - 499
SP - 012016-1
EP - 012016-5
PB - IOP Publ.
CY - Bristol, UK
AN - OPUS4-30541
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Slicing - A New Method For Non Destructive 3D Elemental Sensitive Characterization Of Materials
T2 - International Congress on X-Ray Optics and Microanalysis
CY - Hamburg, Germany
DA - 2013-09-02
PY - 2013
AN - OPUS4-29897
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - ABSORBTION OF THE PRIMARY BEAM IN SR-TXRF ANALYSIS: EXPERIMENTAL VISUALIZATION USING A COLOR X-RAY CAMERA
T2 - International Congress on X-Ray Optics and Microanalysis
CY - Hamburg, Germany
DA - 2013-09-02
PY - 2013
AN - OPUS4-29898
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Evaluation of total reflection X-ray fluorescence (TXRF) analysis using a color X-ray camera (CXC)
T2 - 15th International Conference on Total Reflection X-Ray Fluorescence Analysis and Related Methods (TXRF2013)
CY - Osaka, Japan
DA - 2013-09-23
PY - 2013
AN - OPUS4-29859
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The Color X-Ray Camera: Imaging and Beyond
T2 - ANKA/KNMF User Meeting 2013
CY - 76646 Bruchsal, Deutschland
DA - 2013-09-26
PY - 2013
AN - OPUS4-29900
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - ABSOPTION OF THE PRIMARY BEAM IN SR-TXRF ANALYSIS: EXPERIMENTAL VISUALIZATION USING A COLOR X-RAY CAMERA
T2 - Fifth Joint BER II User Meeting
CY - Berlin, Germany
DA - 2013-12-04
PY - 2013
AN - OPUS4-29901
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - u-SRXRF characterization of Brazilian emeralds
T2 - Fifth Joint BER II and BESSY II User Meeting
CY - Berlin, Germany
DA - 2013-12-04
PY - 2013
AN - OPUS4-29902
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - THE IDEAL SPECIMENT FOR TOTAL REFLECTION X-RAY FLUORESCENCE (TKRF) ANALYSIS:RESULTS FROM SIMULATIONS AMD EXPERIMENTAL EVALUATION
T2 - Fifth Joint BER II and BESSY II User Meeting
CY - Berlin, Germany
DA - 2013-12-04
PY - 2013
AN - OPUS4-29903
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Slicing - A New Method For Non Destructive 3D Elemental Sensitive Characterization Of Materials
T2 - Fifth Joint BER II and BESSY II User Meeting
CY - Berlin, Germany
DA - 2013-12-04
PY - 2013
AN - OPUS4-29904
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Between the Eurasien steppes and China: provenancing the Xiongnu gold by IBA and SRXRF
T2 - Fifth Joint BER II and BESSY II User Meeting
CY - Berlin, Germany
DA - 2013-12-04
PY - 2013
AN - OPUS4-29905
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - THE IDEAL SPECIMENT FOR TOTAL REFLECTION X-RAY FLUORESCENCE (TXRF) ANALYSIS: RESULTS FROM SIMULATIONS AND EXPERIMENTAL EVALUATION
T2 - International Congress on X-Ray Optics and Microanalysis
CY - Hamburg, Germany
DA - 2013-09-02
PY - 2013
AN - OPUS4-29871
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Röntgenfluoreszenzanalyse mit Synchrotronstrahlung an der Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin
T2 - Seminar: "Strahlenphysikalische Anwendungen in Technik und Medizin"
CY - Vienna, Austria
DA - 2013-01-16
PY - 2013
AN - OPUS4-29861
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - "Golden Past and Future" - Applications of Synchrotron Radiation for Cultural Heritage
T2 - 1st INTERNATIONAL CONFERENCE ON INNOVATION IN ART RESEARCH AND TECHNOLOGY INART´13
CY - Evora, Portugal
DA - 2013-07-10
PY - 2013
AN - OPUS4-29862
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - NEW INVESTIGATIONS WITH NANOGRAM MULTI-ELEMENT REFERENCE SAMPLES FOR XRF AND TXRF ANALYSIS
T2 - Denver X-Ray Conference
CY - Westminster, CO, USA
DA - 2013-08-05
PY - 2013
AN - OPUS4-29864
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - THE IDEAL SPECIMENT FOR TOTAL REFLECTION X-RAY FLUORESCENCE (TXRF) ANALYSIS: RESULTS FROM SIMULATIONS AND EXPERIMENTAL EVALUATION
T2 - Denver X-Ray Conference
CY - Westminster, CO, USA
DA - 2013-08-05
PY - 2013
AN - OPUS4-29869
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Reiche, I.
A1 - Muller, K.
A1 - Alberic, M.
A1 - Scharf, O.
A1 - Wahning, A.
A1 - Bjeoumikhov, A.
A1 - Radtke, Martin
A1 - Simon, R.
T1 - Discovering vanished paints and naturally formed gold nanoparticles on 2800 years old Phoenician ivories using SR-FF-microXRF with the color X-ray camera
N2 - Phoenician ivory objects (8th century B.C., Syria) from the collections of the Badisches Landesmuseum, Karlsruhe, Germany, have been studied with full field X-ray fluorescence microimaging, using synchrotron radiation (SR-FF-microXRF). The innovative Color X-ray Camera (CXC), a full-field detection device (SLcam), was used at the X-ray fluorescence beamline of the ANKA synchrotron facility (ANKA-FLUO, KIT, Karlsruhe, Germany) to noninvasively study trace metal distributions at the surface of the archeological ivory objects. The outstanding strength of the imaging technique with the CXC is the capability to record the full XRF spectrum with a spatial resolution of 48 µm on a zone of a size of 11.9 × 12.3 mm² (264 × 264 pixels). For each analyzed region, 69696 spectra were simultaneously recorded. The principal elements detected are P, Ca, and Sr, coming from the ivory material itself; Cu, characteristic of pigments; Fe and Pb, representing sediments or pigments; Mn, revealing deposited soil minerals; Ti, indicating restoration processes or correlated with Fe sediment traces; and Au, linked to a former gilding. This provides essential information for the assessment of the original appearance of the ivory carvings. The determined elemental maps specific of possible pigments are superimposed on one another to visualize their respective distributions and reconstruct the original polychromy and gilding. Reliable hypotheses for the reconstruction of the original polychromy of the carved ivories are postulated on this basis.
KW - SR-FF-microXRF
KW - Elemental imaging
KW - Ivory
KW - Paints
KW - Au NPs
KW - Egyptian blue
KW - Fe
PY - 2013
DO - https://doi.org/10.1021/ac4006167
SN - 0003-2700
SN - 1520-6882
VL - 85
IS - 12
SP - 5857
EP - 5866
PB - American Chemical Society
CY - Washington, DC
AN - OPUS4-30222
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Radtke, Martin
A1 - Reiche, I.
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Guerra, M.F.
T1 - Beyond the Great Wall: Gold of the silk roads and the first empire of the Steppes
N2 - Fingerprinting ancient gold work requires the use of nondestructive techniques with high spatial resolution (down to 25 µm) and good detection limits (micrograms per gram level). In this work experimental setups and protocols for synchrotron radiation induced X-ray fluorescence (SRXRF) at the BAMline of the Berlin electron storage ring company for synchrotron radiation (BESSY) in Berlin for the measurement of characteristic trace elements of gold are compared considering the difficulties, shown in previous works, connected to the quantification of Pt. The best experimental conditions and calculation methods were achieved by using an excitation energy of 11.58 keV, a silicon drift chamber detector (SDD) detector, and pure element reference standards. A detection limit of 3 µg/g has been reached. This newly developed method was successfully applied to provenancing the Xiongnu gold from the Gol Mod necropolis, excavated under the aegis of the United Nations Educational, Scientific and Cultural Organization (UNESCO). The composition of the base alloys and the presence of Pt and Sn showed that, contrary to what is expected, the gold foils from the first powerful empire of the steppes along the Great Wall were produced with alluvial gold from local placer deposits located in Zaamar, Boroo, and in the Selenga River.
KW - Synchrotron radiation
KW - X-ray fluorescence
KW - Limit of detection
KW - Platinum
KW - Silicon drift detector
KW - SR-microXRF
KW - Elemental imaging
KW - Gold
PY - 2013
DO - https://doi.org/10.1021/ac3025416
SN - 0003-2700
SN - 1520-6882
VL - 85
IS - 3
SP - 1650
EP - 1656
PB - American Chemical Society
CY - Washington, DC
AN - OPUS4-30224
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Rakotondrajoa, Andrianiaina
A1 - Buzanich, Günter
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Vincze, L.
A1 - Raboanary, R.
T1 - Improvement of PLS regression-based XRF spectroscopy quantification using multiple step procedure and Monte Carlo simulation
N2 - Partial least squares (PLS) regression-based methods have been proven to be a good alternative for quantification in X-ray fluorescence spectroscopy. These methods are fast and easy to use though giving satisfactory results under certain conditions. One of these conditions is the necessity of having a great number of spectra to build the model (training set). The choice of the constituent concentration range in the training set has a big influence on the accuracy of the model. Better accuracy is obtained if the model is built in relatively narrow regions containing (or close to) the real concentration value.
In the present work, Monte Carlo (MC) simulated spectra are used to form the training set. The advantage to use MC generated training spectra is the unlimited availability of perfect standards.
This paper aims to improve the accuracy of the method by introducing a multiple step procedure in order to build the PLS model using narrow concentration range close to (or containing) the real concentration values in the samples to be measured.
This approach consists of an initial guess of the constituents' concentrations and a preliminary PLS model before building the final model. The prediction of ten MC simulated alloy standard samples containing Ti, Mn, Fe, Co, Cu, Zn, Sr, Zr, and Mo using this method allowed to have average relative prediction errors less than 5% for elements with narrow concentration ranges.
KW - SR-microXRF
KW - Quantification
KW - PLS
KW - Monte Carlo
PY - 2013
DO - https://doi.org/10.1002/xrs.2479
SN - 0049-8246
VL - 42
IS - 4
SP - 183
EP - 188
PB - Wiley
CY - Chichester
AN - OPUS4-30225
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Von Ägypten bis Hiddensee – Analyse von Gold mit Synchrotronstrahlung - Update 2018
N2 - Gold ist eines der sieben schon im Altertum bekannten Metalle und wurde wg. seines Glanzes und seiner Seltenheit von alters her als Tauschmittel und zur Herstellung von Schmuck benutzt. Außerdem ist es einfach bearbeitbar und weitestgehend gegen chemische Einflüsse resistent. Die Untersuchungen von Gold mit synchrotronstrahlungsangeregter Röntgenfluoreszenzanalyse sind zerstörungsfrei und geben Auskunft über die in der untersuchten Probe vorhandenen chemischen Elemente. Bei den hier vorgestellten Untersuchungen an der BAMline stehen Fragestellungen wie Herkunft, Herstellungsverfahren und Zusammengehörigkeit von Goldfunden im Vordergrund. Die verschiedenen Fragestellungen werden an einer Reihe von Beispielen erläutert die vom Wikingerschatz aus Hiddensee über die Himmelsscheibe von Nebra bis hin zu Funden aus Ägypten langen. Zusätzlich werden die modernen Messmethoden vorgestellt, die am Synchrotron heutzutage zur Verfügung stehen.
T2 - Vorlesung FU Berlin Einführung in die Archäometrie
CY - Berlin, Germany
DA - 01.11.2018
KW - Gold
KW - Synchrotron
KW - XRF
KW - BAMline
PY - 2018
AN - OPUS4-46451
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Abad Andrade, Carlos Enrique
A1 - Florek, S.
A1 - Becker-Ross, H.
A1 - Huang, M.-D.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Lippitz, Andreas
A1 - Hodoroaba, Vasile-Dan
A1 - Schmid, Thomas
A1 - Heinrich, Hans-Joachim
A1 - Recknagel, Sebastian
A1 - Jakubowski, Norbert
A1 - Panne, Ulrich
T1 - Zirconium permanent modifiers for graphite furnaces used in absorption spectrometry: understanding their structure and mechanism of action
N2 - The mechanism of action of zirconium permanent modifiers on graphite surfaces was investigated in order to understand its influence on the analytical signal in atomic and molecular absorption spectrometry (AAS/MAS). For this, the molecule formation of CaF was studied, which is used for the indirect analytical determination of fluorine in high-resolution continuum source graphite furnace molecular absorption spectrometry (HR-CS-GFMAS). The kinetics of this reaction was established by monitoring its molecular spectrum at different atomisation temperatures. An Arrhenius plot showed a pseudo-first order reaction with respect to fluorine (n = 1). An intermediate state was isolated, and its structure was elucidated by spectroscopic methods: scanning electron microscopy with energy dispersive X-ray spectroscopy (SEMEDX), X-ray photoelectron spectroscopy (XPS), X-ray absorption spectroscopy (XANES and EXAFS), and Raman microspectroscopy. We propose here a mechanism, where ZrO2 acts as a heterogeneous catalyst: after a pyrolytic step, an intermediate state of ZrO(OCaF) is activated, and at higher temperatures, CaF(g) is released from the zirconium-coated graphite surface. No evidence of the formation of zirconium carbide was found. Consequently, as the CaF formation is catalysed by a heterogeneous catalyst, surface modifications with ZrO2 nanoparticles and ZrO xerogels were investigated in order to increase the surface area. Their influence was evaluated in the molecule formation of CaF, CaCl, CaBr, and CaI. Graphite furnace modification with zirconium oxide nanoparticles proves to be the best choice for fluorine analysis with a signal enhancement of more than eleven times with respect a non-coated graphite furnace. However, the influence of zirconium modifications in the analytical signals of Cl, and I is lower than the F signals or even negative in case of the Br. Understanding zirconium modifiers as heterogeneous catalysts offers a new perspective to AAS and MAS, and reveals the potential of surface analytical methods for development of improved permanent modifiers and graphite furnace coatings.
KW - Zirconium
KW - HR-CS-MAS
KW - Graphite furnace
KW - Nanoparticles
KW - Xerogel
KW - Calcium monofluoride
KW - Absorption spectrometry
PY - 2018
UR - https://pubs.rsc.org/en/content/articlelanding/2018/ja/c8ja00190a
DO - https://doi.org/10.1039/C8JA00190A
SN - 0267-9477
VL - 33
IS - 12
SP - 2034
EP - 2042
PB - Royal Society of Chemistry
AN - OPUS4-46775
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Manso, M.
A1 - Pessanha, S.
A1 - Guerra, M.
A1 - Reinholz, Uwe
A1 - Afonso, C.
A1 - Radtke, Martin
A1 - Lourenco, H.
A1 - Carvalho, M. L.
A1 - de Oliveira Guilherme Buzanich, Ana
T1 - Assessment of Toxic Metals and Hazardous Substances in Tattoo Inks Using Sy-XRF, AAS, and Raman Spectroscopy
N2 - Synchrotron radiation X-ray fluorescence spectroscopy, in conjunction with atomic absorption and Raman spectroscopy, was used to analyze a set of top brand tattoo inks to investigate the presence of toxic elements and hazardous substances. The Cr, Cu, and Pb contents were found to be above the maximum allowed levels established by the Council of Europe through the resolution ResAP(2008)1 on requirements and criteria for the safety of tattoos and permanent makeup. Raman analysis has revealed the presence of a set of prohibited substances mentioned in ResAP(2008)1, among which are the pigments Blue 15, Green 7, and Violet 23. Other pigments that were identified in white, black, red, and yellow inks are the Pigment White 6, Carbon Black, Pigment Red 8, and a diazo yellow, respectively. The present results show the importance of regulating tattoo ink composition.
KW - Synchrotron
KW - Tattoo inks
KW - XRF
KW - Toxic metals
KW - Hazardous substances
PY - 2019
DO - https://doi.org/10.1007/s12011-018-1406-y
VL - 187
IS - 2
SP - 596
EP - 601
PB - Springer
AN - OPUS4-47369
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Hahn, Michael
A1 - Buzanich, Günter
A1 - Jähn, Katharina
A1 - Reinholz, Uwe
A1 - Radtke, Martin
T1 - Analysis of cobalt deposition in periprosthetic bone specimens by high-resolution synchroton XRF in undecalcified histological thin sections
N2 - Increasing numbers of implant revisions are a current clinical issue. Interactions of the endoprosthesis biomaterial with the body affect implantation time by wear processes, i.e. corrosion and abrasion. Previously, cobalt-chrome implants were shown to cause high levels of cobalt ions being deposited in the bone matrix. To determine a poten- tial functional role of these ions on bone homeostasis, we have developed a non-destructive dual analysis of highly sensitive elemental analysis by synchrotron XRF directly in undecalcified histological bone thin sections (4 μm). In this study, samples from 28 bone samples from hip endoprosthesis carriers (Surface Replacement Arthroplasty, metal-on-metal bearing) with an implant lifetime of 17–1750 days were used. Results were compared to age- matched control specimens. The histological analysis identified areas of bone cell activity and assigned them for XRF measurements. Co-Cr wear particles were identified in the bone marrow. In addition, Co ions were highly enriched in the mineralized bone matrix. The cobalt deposits were not homogeneously distributed, and areas of high signal intensity were identified. Co was distinctly deposited in the newly formed osteoid layer, but also within deeper layers of the bone matrix, whereby the Co concentration increased with higher degrees of bone matrix mineralization. In the current study, we determined cobalt accumulations in the bone matrix and showed for the first time via synchrotron XRF with a high spatial resolution direct on histological slides, that cobalt deposits in the mineralized bone matrix in a mineral-specific way that is dependent upon the implant lifetime.
KW - Implant material
KW - Cobalt deposition
KW - Bone matrix
KW - High-resolution synchrotron XRF
KW - Histology
PY - 2019
DO - https://doi.org/10.1016/j.mtla.2019.100290
SN - 2589-1529
VL - 6
SP - 100290, 1
EP - 8
PB - Elsevier Inc.
CY - Amsterdam, Niederlande
AN - OPUS4-47620
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Weber, Kathrin
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Stephan-Scherb, Christiane
T1 - A µ‐XANES study of the combined oxidation/sulfidation of Fe–Cr model alloys
N2 - The precise analysis of cation diffusion profiles through corrosion scales is an important aspect to evaluate corrosion phenomena under multicomponent chemical load, as during high‐temperature corrosion under deposits and salts. The present study shows a comprehensive analysis of cation diffusion profiles by electron microprobe analysis and microbeam X‐ray absorption near edge structure (µ‐XANES) spectroscopy in mixed oxide/sulfide scales grown on Fe–Cr model alloys after exposing them to 0.5% SO2. The results presented here correspond to depth‐dependent phase identification of oxides and sulfides in the corrosion scales by µ‐XANES and the description of oxidation‐state‐dependent diffusion profiles. Scales grown on low‐ and high‐alloyed materials show both a well‐pronounced diffusion profile with a high concentration of Fe3+ at the gas and a high concentration of Fe2+ at the alloy interface. The distribution of the cations within a close‐packed oxide lattice is strongly influencing the lattice diffusion phenomena due to their different oxidation states and therefore different crystal‐field preference energies. This issue is discussed based on the results obtained by µ‐XANES analysis.
KW - X-ray absorption spectroscopy
KW - Oxidation
KW - Sulfidation
PY - 2019
DO - https://doi.org/10.1002/maco.201810644
VL - 70
IS - 8
SP - 1360
EP - 1370
PB - Wiley VCH-Verlag
AN - OPUS4-47934
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - INPR
A1 - Nowak, S. H.
A1 - Petric, M.
A1 - Buchriegler, J.
A1 - Bjeoumikhov, A.
A1 - Bjeoumikhova, Z.
A1 - von Borany, J.
A1 - Munnik, F.
A1 - Radtke, Martin
A1 - Renno, A. D.
A1 - Reinholz, Uwe
A1 - Scharf, O.
A1 - Tilgner, J.
A1 - Wedell, R.
T1 - Road to micron resolution with a color X-ray camera - Polycapillary optics characterization
N2 - In a color X-ray camera spatial resolution is achieved by means of a polycapillary optic conducting X-ray photons from small regions on a sample to distinct energy dispersive pixels on a CCD matrix. At present, the resolution limit of color X-ray camera systems can go down to several microns and is mainly restricted by Pixel dimensions. The recent development of an efficient subpixel resolution algorithm allows a release from pixel size, limiting the resolution only to the quality of theoptics. In this work polycapillary properties that influence the spatial resolution are systematized and assessed both theoretically and experimentally. It is demonstrated that with the current technological Level reaching one micron resolution is challenging, but possible.
KW - Color X-ray camera
KW - Polycapillary optics
PY - 2017
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-404404
DO - https://doi.org/10.48550/arXiv.1705.08939
SN - 2331-8422
SP - 1
EP - 11
PB - Cornell University
CY - Ithaca, NY
AN - OPUS4-40440
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Fittschen, U.E.A.
A1 - Menzel, M.
A1 - Scharf, O.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Buzanich, Günter
A1 - Lopez, V.M.
A1 - McIntosh, K.
A1 - Streli, C.
A1 - Havrilla, G.J.
T1 - Observation of X-ray shadings in synchrotron radiation-total reflection X-ray fluorescence using a color X-ray camera
N2 - Absorption effects and the impact of specimen shape on TXRF analysis has been discussed intensively. Model calculations indicated that ring shaped specimens should give better results in terms of higher counts per mass signals than filled rectangle or circle shaped specimens. One major reason for the difference in signal is shading effects. Full field micro-XRF with a color X-ray camera (CXC) was used to investigate shading, which occurs when working with small angles of excitation as in TXRF. The device allows monitoring the illuminated parts of the sample and the shaded parts at the same time. It is expected that sample material hit first by the primary beam shade material behind it. Using the CXC shading could be directly visualized for the high concentration specimens.
In order to compare the experimental results with calculation of the shading effect the generation of controlled specimens is crucial. This was achieved by 'drop on demand' technology. It allows generating uniform, microscopic deposits of elements. The experimentally measured shadings match well with those expected from calculation.
KW - TXRF
KW - Full field micro-XRF
KW - Color X-ray camera
PY - 2014
DO - https://doi.org/10.1016/j.sab.2014.06.025
SN - 0584-8547
SN - 0038-6987
VL - 99
SP - 179
EP - 184
PB - Elsevier
CY - Amsterdam
AN - OPUS4-31180
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Lahiri, D.
A1 - Sharma, S.M.
A1 - Verma, A.K.
A1 - Vishwanadh, B.
A1 - Dey, G.K.
A1 - Schumacher, G.
A1 - Scherb, T.
A1 - Riesemeier, Heinrich
A1 - Reinholz, Uwe
A1 - Radtke, Martin
A1 - Banerjee, S.
T1 - Investigation of short-range structural order in Zr69.5Cu12Ni11Al7.5 and Zr41.5Ti41.5Ni17 glasses, using X-ray absorption spectroscopy and ab initio molecular dynamics simulations
N2 - Short-range order has been investigated in Zr69.5Cu12Ni11Al7.5 and Zr41.5Ti41.5Ni17 metallic glasses using X-ray absorption spectroscopy and ab initio molecular dynamics simulations. While both of these alloys are good glass formers, there is a difference in their glass-forming abilities (Zr41.5Ti41.5Ni17 > Zr69.5Cu12Ni11Al7.5). This difference is explained by inciting the relative importance of strong chemical order, icosahedral content, cluster symmetry and configuration diversity.
KW - Multi-component alloy
KW - Glass-forming ability
KW - XAFS
KW - Local structure
KW - AIMD simulation
PY - 2014
DO - https://doi.org/10.1107/S1600577514017792
SN - 0909-0495
SN - 1600-5775
VL - 21
IS - 6
SP - 1296
EP - 1304
PB - Blackwell Publishing
CY - Oxford
AN - OPUS4-31837
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Vasilescu, A.
A1 - Constantinescu, B.
A1 - Stan, D.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Buzanich, Günter
A1 - Ceccato, D.
T1 - Studies on ancient silver metallurgy using SR XRF and micro-PIXE
N2 - This work presents a complex evaluation of a series of Geto-Thracian silver adornments found on Romanian territory, part of the 4th century BC Agighiol (Northern Dobruja) hoard and of an ingot from the 1st century BC Geto-Dacian Surcea (Transylvania) hoard, using Synchrotron Radiation X-Ray Fluorescence and micro- Proton Induced X-ray Emission analysis and mapping in order to investigate aspects related to the elemental composition of the metal and the metallurgy implied in their manufacture. One of the samples can be linked to Laurion as the source of metal, and several items contain silver probably originated in Macedonia. The set of silver items was found to be heteregenous as composition and microstructure, and corrosion-related elements could be also identified in the X-Ray maps.
KW - Synchrotron radiation XRF
KW - Micro-PIXE
KW - Archaeological silver
PY - 2015
DO - https://doi.org/10.1016/j.radphyschem.2015.07.008
SN - 0969-806X
SN - 0020-7055
SN - 0146-5724
VL - 117
SP - 26
EP - 34
PB - Pergamon Press
CY - Oxford [u.a.] ; Frankfurt, M.
AN - OPUS4-33809
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Kabelitz, Anke
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Joester, Maike
A1 - Reinholz, Uwe
A1 - Radtke, Martin
A1 - Bienert, Ralf
A1 - Schulz, K.
A1 - Schmack, R.
A1 - Kraehnert, R.
A1 - Emmerling, Franziska
T1 - Time-resolved in situ studies on the formation mechanism of iron oxide nanoparticles using combined fast-XANES and SAXS
N2 - The reaction of iron chlorides with an alkaline reagent is one of the most prominent methods for the synthesis of iron oxide nanoparticles. We studied the particle formation mechanism using triethanolamine as reactant and stabilizing agent. In situ fast-X-ray absorption near edge spectroscopy and small-angle X-ray scattering provide information on the oxidation state and the structural information at the same time. In situ data were complemented by ex situ transmission electron microscopy, wide-angle X-ray scattering and Raman analysis of the formed nanoparticles. The formation of maghemite nanoparticles (γ-Fe2O3) from ferric and ferrous chloride was investigated. Prior to the formation of these nanoparticles, the formation and conversion of intermediate phases (akaganeite, iron(II, III) hydroxides) was observed which undergoes a morphological and structural collapse. The thus formed small magnetite nanoparticles (Fe3O4) grow further and convert to maghemite with increasing reaction time.
KW - oxidation state
KW - structural information
KW - maghemite
PY - 2015
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-351376
DO - https://doi.org/10.1039/C5CE01585E
SN - 1466-8033
VL - 17
IS - 44
SP - 8463
EP - 8470
CY - London, UK
AN - OPUS4-35137
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - RPRT
A1 - Ecker, K. H.
A1 - Wätjen, U.
A1 - Berger, Achim
A1 - Grötzschel, R.
A1 - Persson, L.
A1 - Pritzkow, W.
A1 - Radtke, Martin
A1 - Riebe, Gundel
A1 - Riesemeier, Heinrich
A1 - Vogl, Jochen
T1 - Certification of antimony implanted in silicon wafer with a silicon dioxide diffusion barrier - IRMM-302 and BAM-L001
N2 - This Report describes the certification of the reference material antimony implanted in Si/SiO2 intended to be used for calibration of surface and near surface analytical methods. It describes the preparation, homogeneity measurements and the analytical work performed for the certification of both Areal density of antimony Atoms (retained dose) and the isotope amount Ratio as well as giving considerations on the stability of the material.
KW - Isotope ratio
KW - Areal density
KW - Surface analysis
PY - 2002
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-355752
SP - 1
EP - 40
PB - Institute for Reference Materials and Measurements
CY - Geel, Belgium
AN - OPUS4-35575
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Hachmöller, O.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Aichler, M.
A1 - Radtke, Martin
A1 - Dietrich, D.
A1 - Schwamborn, K.
A1 - Lutz, L.
A1 - Werner, M.
A1 - Sperling, M.
A1 - Walch, A.
A1 - Karst, U.
T1 - Elemental bioimaging and speciation analysis for the investigation of Wilsons disease using μXRF and XANES
N2 - A liver biopsy specimen from a Wilson’s disease (WD) patient was analyzed by means of micro-X-ray fluorescence (mXRF) spectroscopy to determine the elemental distribution. First, bench-top mXRF was utilized for a coarse scan of the sample under laboratory conditions. The resulting distribution maps of copper and iron enabled the determination of a region of interest (ROI) for further analysis. In order to obtain more detailed elemental information, this ROI was analyzed by synchrotron radiation (SR)-based mXRF with a beam size of 4 mm offering a resolution at the cellular level. Distribution maps of additional elements to copper and iron like zinc and manganese were obtained due to a higher sensitivity of SR-mXRF. In addition to this, X-ray absorption near edge structure spectroscopy (XANES) was performed to identify the oxidation states of copper in WD. This speciation analysis indicated a mixture of copper(I) and copper(II) within the WD liver tissue.
KW - progressive hepatolenticular degeneration
KW - mXRF Micro-X-ray fluorescence spectroscopy
KW - XANES X-ray absorption near edge structure spectroscopy
PY - 2016
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-360811
DO - https://doi.org/10.1039/C6MT00001K
SN - 1756-5901
SN - 1756-591X
PB - Royal Society of Chemistry
CY - Cambridge
AN - OPUS4-36081
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Constantinescu, B.
A1 - Vasilescu, A.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Pacheco, C.
A1 - Pichon, L.
A1 - Oberländer-Târnoveanu, E.
T1 - SR XRF and micro-PIXE studies on ancient metallurgy of thirteen Dacian gold bracelets
N2 - A thorough microscopic investigation by SR XRF and micro-PIXE brings insight into the probable techniques used in the manufacture of thirteen Dacian gold bracelets, one of the most spectacular archaeological finds ever on the territory of Romania.
KW - Micro-SR-XRF
KW - Micro-PIXE
KW - Archaeometry
KW - Gold
KW - Romania
PY - 2012
DO - https://doi.org/10.1007/s00339-012-7306-7
SN - 0947-8396
VL - 109
IS - 2
SP - 395
EP - 402
PB - Springer
CY - Berlin
AN - OPUS4-26902
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
A1 - Constantinescu, B.
T1 - SR-XRF and Micro-PIXE Studies on Ancient Metallurgy of Twelve Dacian Gold Bracelets
T2 - SR2A 2012
CY - New York City, NY, USA
DA - 2012-06-05
PY - 2012
AN - OPUS4-26920
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The colour Xray camera: basics, applications and perspectives
T2 - Analytik 2012
CY - Beijing, China
DA - 2012-03-23
PY - 2012
AN - OPUS4-26922
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Praktische Anwendung der Atomtheorie
T2 - Galileo Gymnasium
CY - Berlin, Germany
DA - 2012-08-30
PY - 2012
AN - OPUS4-26923
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - First experiences with the combination of polycapillary optics and an energy dispersive pn- CCD detector at BAMline at Bessy
T2 - X-ray micro-fluorescence spectroscopy at the PETRA III extension: second user workshop
CY - Hamburg, Germany
DA - 2011-09-27
PY - 2011
AN - OPUS4-26924
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The colour Xray camera: basics, application and perspectives
T2 - EXRS 2012
CY - Vienna, Austria
DA - 2012-06-18
PY - 2012
AN - OPUS4-26925
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Röntgenfluoreszenzanalyse mit Synchrotronstrahlung an der Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin
T2 - Seminar: "Strahlenphysikalische Anwendungen in Technik und Medizin"
CY - Vienna, Austria
DA - 2011-11-23
PY - 2011
AN - OPUS4-26926
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Die Himmelsscheibe von Nebra: Vermutungen und Fakten
T2 - Schul- und Volkssternwarte
CY - Dahlewitz, Germany
DA - 2012-03-09
PY - 2012
AN - OPUS4-26927
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Ordavo, I.
A1 - Ihle, S.
A1 - Arkadiev, V.
A1 - Scharf, Oliver
A1 - Soltau, H.
A1 - Bjeoumikhov, A.
A1 - Bjeoumikhova, S.
A1 - Buzanich, Günter
A1 - Gubzhokov, R.
A1 - Günther, A.
A1 - Hartmann, R.
A1 - Holl, P.
A1 - Kimmel, N.
A1 - Kühbacher, M.
A1 - Lang, M.
A1 - Langhoff, N.
A1 - Liebel, A.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Schaller, G.
A1 - Schopper, F.
A1 - Strüder, L.
A1 - Thamm, C.
A1 - Wedell, R.
T1 - A new pnCCD-based color X-ray camera for fast spatial and energy-resolved measurements
N2 - We present a new high resolution X-ray imager based on a pnCCD detector and a polycapillary optics. The properties of the pnCCD like high quantum efficiency, high energy resolution and radiation hardness are maintained, while color corrected polycapillary lenses are used to direct the fluorescence photons from every spot on a sample to a corresponding pixel on the detector. The camera is sensitive to photons from 3 to 40 keV with still 30% quantum efficiency at 20 keV. The pnCCD is operated in split frame mode allowing a high frame rate of 400 Hz with an energy resolution of 152 eV for Mn Kα (5.9 keV) at 450 kcps. In single-photon counting mode (SPC), the time, energy and position of every fluorescence photon is recorded for every frame. A dedicated software enables the visualization of the elements distribution in real time without the need of post-processing the data. A description of the key components including detector, X-ray optics and camera is given. First experiments show the capability of the camera to perform fast full-field X-Ray Fluorescence (FF-XRF) for element analysis. The imaging performance with a magnifying optics (3×) has also been successfully tested.
KW - X-ray CCD camera
KW - pnCCD
KW - Fast X-ray imaging
KW - XRF
KW - Full-field X-ray fluorescence
KW - Elemental analysis
KW - High quantum efficiency
KW - High energy resolution
KW - Polycapillary optics
PY - 2011
DO - https://doi.org/10.1016/j.nima.2011.05.080
SN - 0168-9002
SN - 0167-5087
VL - 654
SP - 250
EP - 257
PB - North-Holland
CY - Amsterdam
AN - OPUS4-24370
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Kühn, Andreas
A1 - Scharf, Oliver
A1 - Ordavo, I.
A1 - Riesemeier, Heinrich
A1 - Reinholz, Uwe
A1 - Radtke, Martin
A1 - Berger, Achim
A1 - Ostermann, Markus
A1 - Panne, Ulrich
T1 - Pushing the limits for fast spatially resolved elemental distribution patterns
N2 - A new setup for fast spatially resolved measurements of elemental trace amounts under total reflection conditions using a new colour X-ray camera is described. Samples prepared on conventional total reflection X-ray fluorescence (TXRF) reflectors were measured at BESSY II synchrotron. A spatial resolution of 50 × 50 µm² was obtained, while the required time for the investigation of a 10 × 10 mm² sample is 30 seconds. The set-up is up to 350 times faster than conventional X-ray fluorescence systems for elemental traces. The major components of the X-ray camera are polycapillary optics and a pn-CCD chip with an active area of 13 × 13 mm². This area is divided into 264 × 264 pixels of 48 × 48 µm². A full X-ray spectrum with a resolution of 152 eV @ 5.9 keV and a chip temperature of 246 K is recorded for each pixel. The chip has a read-out rate of 400 Hz.
PY - 2011
DO - https://doi.org/10.1039/c1ja10069f
SN - 0267-9477
SN - 1364-5544
VL - 26
SP - 1986
EP - 1989
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-24386
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Rodrigues, M.
A1 - Schreiner, M.
A1 - Melcher, M.
A1 - Guerra, M.
A1 - Salomon, J.
A1 - Radtke, Martin
A1 - Alram, M.
A1 - Schindel, N.
T1 - Characterization of the silver coins of the Hoard of Becin by x-ray based methods
N2 - Four hundred sixteen silver coins stemming from the Ottoman Empire (16th and 17th centuries) were analyzed in order to confirm the fineness of the coinage as well as to study the provenance of the alloy used for the coins. As most of the coins showed the typical green patina on their surfaces due to corrosion processes which have led to the depletion of copper in the near-surface domains of the silver coins in comparison to their core composition, small samples by cutting splinters from the coins had to be taken, embedded in synthetic resin and cross-sectioned in order to investigate the true-heart metal composition. The type of the alloy was investigated as well as if coins minted in different locations demonstrated homogeneous traits concerning the predominant impurities which could suggest a common ore. Several X-ray based techniques (µ-XRF, µ-SRXRF and µ-PIXE) could be applied in order to determine the silver contents as well as the minor and trace elements. Finally, SEM/EDX was applied in order to study the homogeneity/heterogeneity of the coins and the presence of surface enrichments. In general, the silver content of the analyzed specimen varies between 90% and 95%. These outcomes have not supported the historical interpretations, which predict that during the period studied a debasement of approximately 44% of the silver content of the coins should have occurred.
KW - PIXE
KW - SRXRF
KW - SEM/EDX
KW - Silver coins
PY - 2011
DO - https://doi.org/10.1016/j.nimb.2011.04.068
SN - 0168-583X
SN - 1872-9584
VL - 269
IS - 24
SP - 3041
EP - 3045
PB - Elsevier B.V.
CY - Amsterdam
AN - OPUS4-25289
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - El-Hasan, T.
A1 - Szczerba, Wojciech
A1 - Buzanich, Günter
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
A1 - Kersten, M.
T1 - Cr(VI)/Cr(III) and As(V)/As(III) ratio assessments in Jordanian spent oil shale produced by aerobic combustion and anaerobic pyrolysis
N2 - With the increase in the awareness of the public in the environmental impact of oil shale utilization, it is of interest to reveal the mobility of potentially toxic trace elements in spent oil shale. Therefore, the Cr and As oxidation state in a representative Jordanian oil shale sample from the El-Lajjoun area were investigated upon different lab-scale furnace treatments. The anaerobic pyrolysis was performed in a retort flushed by nitrogen gas at temperatures in between 600 and 800 °C (pyrolytic oil shale, POS). The aerobic combustion was simply performed in porcelain cups heated in a muffle furnace for 4 h at temperatures in between 700 and 1000 °C (burned oil shale, BOS). The high loss-on-ignition in the BOS samples of up to 370 g kg–1 results from both calcium carbonate and organic carbon degradation. The LOI leads to enrichment in the Cr concentrations from 480 mg kg–1 in the original oil shale up to 675 mg kg–1 in the ≥850 °C BOS samples. Arsenic concentrations were not much elevated beyond that in the average shale standard (13 mg kg–1). Synchrotron-based X-ray absorption near-edge structure (XANES) analysis revealed that within the original oil shale the oxidation states of Cr and As were lower than after its aerobic combustion. Cr(VI) increased from 0% in the untreated or pyrolyzed oil shale up to 60% in the BOS ash combusted at 850 °C, while As(V) increased from 64% in the original oil shale up to 100% in the BOS ash at 700 °C. No Cr was released from original oil shale and POS products by the European compliance leaching test CEN/TC 292 EN 12457-1 (1:2 solid/water ratio, 24 h shaking), whereas leachates from BOS samples showed Cr release in the order of one mmol L–1. The leachable Cr content is dominated by chromate as revealed by catalytic adsorptive stripping voltammetry (CAdSV) which could cause harmful contamination of surface and groundwater in the semiarid environment of Jordan.
KW - Trace-elements
KW - Fly-ash
KW - Speciation
KW - Chromium
KW - Sediments
KW - Behavior
KW - Metals
KW - Xanes
KW - Cr
KW - Transformation
PY - 2011
DO - https://doi.org/10.1021/es200695e
SN - 0013-936X
SN - 1520-5851
VL - 45
IS - 22
SP - 9799
EP - 9805
PB - ACS Publ.
CY - Washington, DC
AN - OPUS4-25290
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The Colour X-Ray Camera: Basics, Applications and Perspectives
T2 - Third Joint BER II and Bessy II User`s Meeting
CY - Berlin, Germany
DA - 2011-11-30
PY - 2011
AN - OPUS4-25269
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Guilherme, A.
A1 - Buzanich, Günter
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Coroado, J.
A1 - Dos Santos, J.M.F.
A1 - Carvalho, M.L.
T1 - Synchrotron micro-XRF with compound refractive lenses (CRLs) for tracing key elements on Portuguese glazed ceramics
N2 - Several glazed ceramic fragments (XVIth to XVIIIth centuries) from two production centers in Portugal (Coimbra and Lisbon) were the object of this study. The ones from Coimbra comprise two sets of samples: faiences and tiles. The ones from Lisbon are only tiles (azulejos, in Portuguese). The three main divisions of such pieces are the ceramic support (body), glaze and surface decoration. The system decoration/glaze is not easy to investigate, due to the high heterogeneity resulting from the mixing procedures and firing temperatures used. Moreover, the ability of the pigment to diffuse into the base glaze varies depending on the composition of both the pigment and the glaze in terms of fusibility. In order to raster these effects, high resolution techniques are required. In this work, synchrotron micro-X-ray fluorescence (µ-XRF) analysis was performed to monitor the profiles of the characteristic elements from the colors used and the glaze in well prepared cross-sections of the samples. Key elements are: Co for blue, Mn for purple, Cu for green, Sb for yellow, Pb for the glaze and Fe for the body. The major difference observed is that faiences have glaze thicknesses between 150 and 200 µm and tiles have glaze thicknesses between 350 and 400 µm. Furthermore, in faiences all the pigments except the yellow ones are well dispersed into the glassy matrix, while in tiles, all of them are just partially diffused throughout the glaze. However, differences between the tiles from Coimbra and Lisbon were observed. In the samples from Lisbon, a higher intake from the pigment throughout the glaze is observed.
KW - Synchrotron micro-XRF
KW - Compound refractive lenses (CRLs)
KW - Portuguese glazed ceramics
PY - 2012
DO - https://doi.org/10.1039/c2ja30030c
SN - 0267-9477
SN - 1364-5544
VL - 27
IS - 6
SP - 966
EP - 974
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-26789
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Buzanich, Günter
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Streli, C.
T1 - Micro-X-ray absorption spectroscopy with compound refractive lenses
N2 - A study regarding the possibility to use compound refractive lenses (CRLs) for X-ray absorption spectroscopy (XAS) was conducted. For XAS measurements the energy of the monochromatic incident beam has to be tuned over an energy range which is broader than the energy bandwidth of a CRL. To prove that µ-XAS with compound refractive lenses is possible, it had to be investigated how changes in the energy influence the beam parameters. This was done by tuning the energy around the nominal energy of the lens and recording images with a high resolution X-ray imaging setup. To investigate the changes in the spot size the scintillator was placed at the nominal focal distance and scans along the beam axis were performed. The effect on the photon flux of the incident beam due to absorption in the lens was investigated by performing XANES measurement on different reference materials with and without CRL. The results of these measurements using a CRL designed for 9 keV are shown and discussed.
KW - Micro-XAS
KW - Compound refractive lens
PY - 2012
DO - https://doi.org/10.1039/c2ja30130j
SN - 0267-9477
SN - 1364-5544
VL - 27
IS - 10
SP - 1803
EP - 1808
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-26790
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Buzanich, Günter
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Thünemann, Andreas
A1 - Streli, C.
T1 - Impurities in multicrystalline silicon wafers for solar cells detected by synchrotron micro-beam X-ray fluorescence analysis
N2 - We report on the trace analysis of copper and iron impurities in multicrystalline silicon wafers with the microbeam X-ray fluorescence (µ-XRF) technique. The efficiency of solar cells, which are based on multicrystalline silicon wafers, is strongly influenced by minor contamination with metals such as copper and iron. Application of compound refractive lenses (CRLs) in µ-XRF allows versatile two-dimensional mapping of relevant contaminations and localization of their sites of deposition. In this context, the measured bulk average limit of detection (LOD) was one picogram of iron and copper per gram of silicon. We suggest that µ-XRF is a valuable tool for non-destructive spatial (3D) quantification of metal impurities in a wide range of materials and devices whose functioning could be critically affected by impurities.
KW - X-ray micro beam
KW - Compound refractive lens
KW - Solar cell
KW - Silicon impurities
PY - 2012
DO - https://doi.org/10.1039/c2ja30188a
SN - 0267-9477
SN - 1364-5544
VL - 27
IS - 11
SP - 1875
EP - 1881
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-26791
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Zier, M.
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Radtke, Martin
A1 - Munnik, F.
T1 - Accurate stopping power determination of 15N ions for hydrogen depth profiling by a combination of ion beams and synchrotron radiation
N2 - Hydrogen analysis is of particular importance in thin film technology and it is often necessary to obtain a depth profile. The method with the best depth resolution is NRA using the 6385 keV resonance of the 1H(15N,αγ)12C nuclear reaction. The correct quantification of the depth and concentration scales in the measured hydrogen profiles relies on accurate stopping power values. We present a method to deduce these values from a combination of two techniques: NRA and X-ray reflectometry (XRR). This method is applied to the determination of the stopping power of ~6.4 MeV 15N ions in H-containing amorphous Si-layers (a-Si:H). Density-independent stopping powers at different H concentrations are determined by combining the results from NRA and XRR with an overall uncertainty of 3.3%, showing good agreement with SRIM values. This work shows exemplary the methodology for future evaluation of stopping powers for quality assurance in NRA.
KW - Nuclear reaction analysis
KW - Hydrogen depth profiling
KW - Stopping cross section
KW - Linear energy transfer
KW - Synchrotron radiation
KW - XRR
PY - 2012
DO - https://doi.org/10.1016/j.nimb.2011.07.027
SN - 0168-583X
SN - 1872-9584
VL - 273
SP - 18
EP - 21
PB - Elsevier
CY - Amsterdam
AN - OPUS4-25722
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - X-ray Fluorescence analysis using synchrotron radiation excitation
T2 - 75. Jahrestagung der DPG und DPG Frühjahrstagung
CY - Dresden, Germany
DA - 2011-03-13
PY - 2011
AN - OPUS4-24023
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The colour X-ray camera: Basics, Applications and Perspectives
T2 - 21st International Congress on X-ray Optics and Microanalysis (ICXOM21)
CY - Campinas, Brazil
DA - 2011-09-05
PY - 2011
AN - OPUS4-24024
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Non-invasive spatial scanning for iron and calcium in the enamel of a red toothed shrew, Sorex araneus (Soricidae, Lipotyphla)
T2 - 85th Annual Conference of the German Society of Mammalogy
CY - Luxembourg City, Luxembourg
DA - 2011-09-13
PY - 2011
AN - OPUS4-24025
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Materialforschung an der BAMline
T2 - DGM-Fachausschuss Werkstoffcharakterisierung mit Strahllinien
CY - Berlin, Germany
DA - 2011-05-27
PY - 2011
AN - OPUS4-24026
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Kaiser, J.
A1 - Szczerba, Wojciech
A1 - Riesemeier, Heinrich
A1 - Reinholz, Uwe
A1 - Radtke, Martin
A1 - Albrecht, M.
A1 - Lu, Y.
A1 - Ballauff, M.
T1 - The structure of AuPd nanoalloys anchored on spherical polyelectrolyte brushes determined by x-ray absorption spectroscopy
N2 - Well-defined and facetted bimetallic gold–palladium nanoalloys have been synthesized and anchored in spherical polyelectrolyte brushes (SPB) as composite particles (AuPd@SPB). These particles are better catalysts in aqueous phase than the pure metals. The atomistic arrangement of these nanoalloys has been analysed by extended X-ray absorption fine structure (EXAFS) spectroscopy at the Au–L3 and the Pd–K absorption edge. The samples with high amounts of gold appear as almost statistically mixed random alloys. Alloy compositions with less gold show slight enrichment of Pd at the surface of the particle. In addition, signals of non-metallic palladium appear at the Pd–K edge which indicate the presence of the Pd2+ species in addition to metallic palladium. The relation of these structural features to the catalytic activity is discussed.
KW - EXAFS
KW - Nanoalloys
KW - Gold
KW - Palladium
KW - K-edge
KW - L3-edge
KW - HR-TEM
KW - Synchrotron radiation
KW - BAMline
PY - 2013
DO - https://doi.org/10.1039/c3fd20132e
SN - 1359-6640
SN - 1364-5498
VL - 162
SP - 45
EP - 55
PB - Soc.
CY - Cambridge [u.a.]
AN - OPUS4-28300
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The Color X-Ray Camera: Basics, Applications and Perspectives
T2 - Third Joint BER II and BESSY II Users´ Meeting
CY - Berlin, Germany
DA - 2011-11-30
PY - 2011
AN - OPUS4-25127
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Constantinescu, B.
A1 - Vasilescu, A.
A1 - Stan, D.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Buzanich, Günter
A1 - Ceccato, D.
A1 - Oberländer-Târnoveanu, E.
T1 - Studies on archaeological gold items found in Romanian territory using X-ray-based analytical spectrometry
N2 - This paper is an overview of the work developed by our group in the investigations of museum objects and alluvial gold, reflected in a series of studies published between 2000–2011, supplemented with new results, unpublished up-to-date. The X-ray based spectrometric techniques employed range from various X-Ray Fluorescence (XRF) investigations to ion beam analysis, including synchrotron radiation XRF and micro-Particle Induced X-ray Emission. The gold objects discussed are mainly part of the Sarmizegetusa Dacian hoards—spiraled bracelets (armbands) and coins. After obtaining in 2011 the permission of the Romanian authorities to take very small (1–2 mg) samples from the most 'unimportant' areas of the Dacian bracelets and several Koson staters, to analyze them by micro-SR-XRF at BESSY, in February 2012, the investigation of several micro-areas of 17 stater and 28 bracelet samples revealed important micro-structural inhomogeneity, especially in Sn and Cu. The same inhomogeneous micro-structure has been seen in Transylvanian alluvial gold. The analyses revealed details on the fingerprint of geological gold deposits and also the main characteristics of ancient gold metallurgy procedures used by the Dacians: a relatively low temperature (lower than Au melting point) and hammering during heating to obtain an ingot through sintering. The use of the sintering procedure was proved for the spiraled bracelets and the Koson without monogram coins, a tradition starting in the Bronze Age in Transylvanian gold processing. The existence of micro-inclusions of Ta-minerals in alluvial gold was also detected, explaining Ta trace presence in the artifacts from the Pietroasa hoard.
KW - Micro-SR-XRF
KW - Micro-PIXE
KW - Archaeometry
KW - Gold
KW - Romania
PY - 2012
DO - https://doi.org/10.1039/c2ja30158j
SN - 0267-9477
SN - 1364-5544
VL - 27
IS - 12
SP - 2076
EP - 2081
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-26991
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Rodrigues, M.
A1 - Schreiner, M.
A1 - Melcher, M.
A1 - Guerra, M.
A1 - Salomon, J.
A1 - Radtke, Martin
A1 - Alram, M.
A1 - Schindel, N.
T1 - Analysis of the hoard of Becin using X-ray-based techniques
N2 - Four hundred and sixteen silver coins stemming from the Ottoman Empire (16th and 17th centuries) were analyzed to confirm the fineness of the coinage as well as to study the provenance of the alloy used for the coins. As most of the coins showed the typical green patina on their surfaces due to corrosion processes that have led to the depletion of copper in the near surface domains of the silver coins in comparison to their core composition, small samples had to be taken, embedded in synthetic resin, and cross sectioned to investigate the true-heart metal composition. µ-synchrotron micro X-ray fluorescence analysis and µ-proton-induced X-ray emission were applied to determine the silver contents as well as the minor and trace elements. The type of the alloy was investigated as well as if coins minted in different locations demonstrated homogeneous traits concerning the predominant impurities (Au and Bi), which could suggest a common ore. Finally, energy-dispersive microanalysis in a scanning electron microscope was applied to study the homogeneity/heterogeneity of the coins and the presence of surface enrichments and to explain differences between the µ-synchrotron micro X-ray fluorescence analysis and µ-proton-induced X-ray emission measurements concerning the main component. In general, the silver content of the analyzed specimen varies between 90 and 95%. These outcomes have not supported the historical interpretations, which predict that during the period studied, a debasement of approximately 44% of the silver content of the coins should have occurred.
KW - SRXRF
KW - Silber
KW - BAMline
PY - 2012
DO - https://doi.org/10.1002/xrs.2415
SN - 0049-8246
VL - 41
IS - 6
SP - 416
EP - 424
PB - Wiley
CY - Chichester
AN - OPUS4-27723
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
T1 - Spatially-resolved detection of iodine in natural plantinum-palladium nuggets: a comparison of PIXE and XRF
T2 - European Conference on X-ray Spectrometry
CY - Figueira da Foz, Portugal
DA - 2010-06-20
PY - 2010
AN - OPUS4-21073
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Scharf, Oliver
A1 - Ihle, S.
A1 - Ordavo, I.
A1 - Arkadiev, V.
A1 - Bjeoumikhov, A.
A1 - Bjeoumikhova, S.
A1 - Buzanich, Günter
A1 - Gubzhokov, R.
A1 - Günther, A.
A1 - Hartmann, R.
A1 - Kühbacher, M.
A1 - Lang, M.
A1 - Langhoff, N.
A1 - Liebel, A.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Soltau, H.
A1 - Strüder, L.
A1 - Thünemann, Andreas
A1 - Wedell, R.
T1 - Compact pnCCD-based X-ray camera with high spatial and energy resolution: a color X-ray camera
N2 - For many applications there is a requirement for nondestructive analytical investigation of the elemental distribution in a sample. With the improvement of X-ray optics and spectroscopic X-ray imagers, full field X-ray fluorescence (FF-XRF) methods are feasible. A new device for high-resolution X-ray imaging, an energy and spatial resolving X-ray camera, is presented. The basic idea behind this so-called 'color X-ray camera' (CXC) is to combine an energy dispersive array detector for X-rays, in this case a pnCCD, with polycapillary optics. Imaging is achieved using multiframe recording of the energy and the point of impact of single photons. The camera was tested using a laboratory 30 µm microfocus X-ray tube and synchrotron radiation from BESSY II at the BAMline facility. These experiments demonstrate the suitability of the camera for X-ray fluorescence analytics. The camera simultaneously records 69696 spectra with an energy resolution of 152 eV for manganese Kα with a spatial resolution of 50 µm over an imaging area of 12.7 × 12.7 mm². It is sensitive to photons in the energy region between 3 and 40 keV, limited by a 50 µm beryllium window, and the sensitive thickness of 450 µm of the chip. Online preview of the sample is possible as the software updates the sums of the counts for certain energy channel ranges during the measurement and displays 2-D false-color maps as well as spectra of selected regions. The complete data cube of 264 × 264 spectra is saved for further qualitative and quantitative processing.
KW - Color X-ray camera
KW - X-ray fluorescence
KW - pnCCD
KW - Polycapillary optic
KW - Synchrotron radiation
PY - 2011
DO - https://doi.org/10.1021/ac102811p
SN - 0003-2700
SN - 1520-6882
VL - 83
IS - 7
SP - 2532
EP - 2538
PB - American Chemical Society
CY - Washington, DC
AN - OPUS4-23948
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Röntgenfluoreszenzanalyse mit Synchrotronstrahlung an derr Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin
T2 - Seminar: Strahlenphysikalische Anwendungen in Technik und Medizin
CY - Vienna, Austria
DA - 2010-01-13
PY - 2010
AN - OPUS4-23261
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
T1 - Synchrotron radiation induced X-ray fluorescence for the characterization of ancient gold objects
KW - Gold
KW - Hiddensee treasure
KW - Nebra sky disc
KW - Non-destructive testing
KW - Silver point drawings
KW - Synchrotron
KW - X-ray fluorescence
KW - Or
KW - Trésor d´Hiddensee
KW - Disque déleste de Nebra
KW - Analyse non-destructive
KW - Dessins à pointe d´argent
KW - Synchrotron
KW - Fluorescence à rayons X
PY - 2009
SN - 0399-1237
VL - 33
SP - 39
EP - 44
PB - Groupe
CY - Rennes
AN - OPUS4-23219
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Polte, Jörg
A1 - Kraehnert, R.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Thünemann, Andreas
A1 - Emmerling, Franziska
T1 - New insights of the nucleation and growth process of gold nanoparticles via in situ coupling of SAXS and XANES
N2 - Although metallic nanoparticles play an important role in the area of nanotechnology, a coherent mechanistic explanation for the evolution of the particles during their chemical synthesis has not yet been provided in many cases. To gain a profound understanding of the growth mechanism of colloidal nanoparticles, new approaches using Small Angle X-Ray Scattering (SAXS) combined with X-ray absorption near-edge structure (XANES) are presented. This combination allows for insights into two prominent syntheses routes of gold nanoparticles (GNP): The 'slow' reaction using sodium citrate (30-90 min) as a reducing agent and the 'fast' reaction employing NaBH4 (within few seconds). In the first case data derived with the coupled XANES and SAXS suggests a four-step particle formation mechanism. For the second system a time resolution in the order of 100-200 ms was achieved by coupling a common laboratory SAXS instrument with a microstructured mixer, which allows data acquisition in a continuous-flow mode. The results indicate a coalescence driven growth process. Based on the capabilities to deduce the size, number and polydispersity of the particles, the results of both methods enable the development of mechanistic schemes explaining the different phases of particle formation and growth, thus providing a basis for improved control over the synthesis processes.
KW - SAXS
KW - XANES
KW - Nanoparticle formation
PY - 2010
DO - https://doi.org/10.1088/1742-6596/247/1/012051
SN - 1742-6588
SN - 1742-6596
VL - 247
IS - 1
SP - 012051-1 - 012051-10
PB - IOP Publ.
CY - Bristol, UK
AN - OPUS4-22684
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Constantinescu, B.
A1 - Vasilescu, A.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
T1 - A study on gold and copper provenance for Romanian prehistoric objects using micro-SR XRF
N2 - This study intends to clarify the metal provenance of gold archaeological items using the variation of the Au–Ag ratio and the presence of trace elements as Sn, Sb, Te, and Pb, concentrating on gold Dacian Koson coins, recovered recently. It also extends the area of our investigations to the copper provenance of Bronze Age artifacts—axes, sickles, and celts—found on Romanian territory. The experiments were performed by micro-SR XRF at BESSY Berlin, at the BAM-line facility. Two types of coins (Koson, with and without monogram) were analysed. The conclusions we reached were that most of the monogram coins are made from refined gold (3–5% Ag, less than 0.5% Cu), while the without monogram coins are made from native Transylvanian gold (9–20% Ag, 0.5–2% Cu), of alluvial origin, proved by the presence of Sn, Sb and Te embedded in the gold. The problem of provenance for prehistoric Romanian copper and bronze objects consists in linking their elemental compositional patterns to the ones of the Bronze Age regional mines from Bulgaria, Serbia or Transylvania, most likely used as ore sources for their manufacture. The studied samples present relevant traces of As, Ag, Sb, and Co, suggesting the most probable use of copper from Serbia or northern Bulgaria for their manufacture.
KW - X-ray fluorescence
KW - Synchrotron radiation
KW - Proton induced X-ray emission
KW - Archaeometry
KW - Gold
PY - 2011
DO - https://doi.org/10.1039/c0ja00215a
SN - 0267-9477
SN - 1364-5544
VL - 26
IS - 5
SP - 917
EP - 921
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-23191
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Constantinescu, B.
A1 - Bugoi, R.
A1 - Cojocaru, V.
A1 - Radtke, Martin
A1 - Calligaro, T.
A1 - Salomon, J.
A1 - Pichon, L.
A1 - Röhrs, S.
A1 - Ceccato, D.
A1 - Oberländer-Târnoveanu, E.
A1 - Ionescu, C.
A1 - Pop, D.
T1 - Dacian bracelets and Transylvanian gold: ancient history and modern analyses
KW - SRXRF
KW - Gold
KW - Archaeometrie
KW - Authentication
KW - Provenance
KW - XRF
KW - Micro-PIXE
KW - Micro SR-XRF
KW - Or
KW - Authentification
KW - FX
PY - 2009
SN - 0399-1237
VL - 33
SP - 221
EP - 225
PB - Groupe
CY - Rennes
AN - OPUS4-23172
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Cabral, A.R.
A1 - Radtke, Martin
A1 - Munnik, F.
A1 - Lehmann, B.
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Tupinambá, M.
A1 - Kwitko-Ribeiro, R.
T1 - Iodine in alluvial platinum-palladium nuggets: evidence for biogenic precious-metal fixation
N2 - Synchrotron radiation-induced X-ray fluorescence (SR-XRF) spectrometry was applied to determine iodine concentrations in alluvial Pt–Pd aggregates with delicate morphological features from Córrego Bom Sucesso, Minas Gerais, Brazil. The millimetre-sized botryoidal and rod-shaped grains of alluvial Pt–Pd–Hg intermetallic compounds have surprisingly high concentrations of iodine, in the range from 10 to ~ 120 μg/g. Because iodine is a strongly biophile element, known to be enriched in peatlands and plant remains in soils by microbial activity, its concentration in the Pt–Pd nuggets suggests biogenic precious-metal fixation in the aqueous alluvial milieu. Biogenic and inorganic processes, such as bioreduction and electrochemical metal accretion, could mutually have contributed to the growth of nanoparticles, formed on organic templates, to millimetric Pt–Pd nuggets.
KW - Lodine
KW - Pt-Pd nuggets
KW - Córrego Bom Sucesso
KW - Minas Gerais
KW - Brazil
PY - 2011
DO - https://doi.org/10.1016/j.chemgeo.2010.12.003
SN - 0009-2541
SN - 1872-6836
VL - 281
IS - 1-2
SP - 125
EP - 132
PB - Elsevier B.V.
CY - Amsterdam
AN - OPUS4-23174
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Grunewald, Christian
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Buzanich, Günter
A1 - Riesemeier, Heinrich
T1 - SRXRF-measurements at non-planar objects: automatic determination of the angle of incidence of the exciting X-ray
N2 - For quantitative SRXRF measurements the angle of incidence of the incoming X-ray beam is an important factor. When the sample is focused by a long-range-microscope, the determination of the angle can be automatized using a simple algorithm. This was developed to improve the orientation of especially round or ornate samples. As a side effect the three dimensional surface can be reconstructed, too.
KW - X-ray fluorescence
KW - Synchrotron radiation
KW - Long-range microscope
PY - 2011
DO - https://doi.org/10.1039/c0ja00237b
SN - 0267-9477
SN - 1364-5544
VL - 26
IS - 5
SP - 1088
EP - 1089
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-23193
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Rodrigues, M.
A1 - Cappa, F.
A1 - Schreiner, M.
A1 - Ferloni, P.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Woytek, B.
A1 - Alram, M.
T1 - Further metallurgical analyses on silver coins of Trajan (AD 98-117)
N2 - Within an interdisciplinary project, preliminary results of which were published in 2007, a group of 65 silver coins (denarii) of Trajan, evenly distributed over the entire span of his reign (2nd to 6th consulate), as well as 3 coins from the reign of his predecessor, the emperor Nerva (AD 9698), had been acquired on the coin market. These pieces could be cross-sectioned in order to carry out analyses. Measurements were performed with µ-XRF and µ-SRXRF to check the fineness of the denarius alloy as well as to investigate if the coins of the different consulates showed distinct traits concerning the main impurities which could suggest a change of ore sources. Furthermore, it was examined whether the influx of precious metals into the Roman treasury after Trajan's Dacian campaigns (AD 101/102 and 105/106) could have had any repercussions on the composition of the denarius alloy; comparative data was provided by the analysis of nine imitations of Roman Republican denarii presumably struck in Dacia. Documentation of the cross-sections was performed with SEM/EDX in order to clarify details concerning the specific microstructure of the coins. An enrichment of Ag of approx. 100 to 200 µm in the near surface regions of most of the coins could be observed, which is due to corrosion effects. Previous metallographic analyses done by several scholars had been inadequate to clarify the central numismatic and economic questions. With the presented analyses, it was possible to correct the results of the earlier research and to provide, for the first time, a secure basis of data for the investigation of the development of the silver alloy used for denarii in Trajan's reign.
PY - 2011
DO - https://doi.org/10.1039/c0ja00252f
SN - 0267-9477
SN - 1364-5544
VL - 26
IS - 5
SP - 873
EP - 1100
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-23623
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Materialforschung an der BAMline
T2 - Seminar Strahlenphysikalische Anwendungen in Technik und Medizin
CY - Vienna, Austria
DA - 2010-01-13
PY - 2010
AN - OPUS4-23605
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Radtke, Martin
A1 - Vincze, L.
A1 - Görner, Wolf
T1 - Quantification of energy dispersive SRXRF for the certification of reference materials at BAMline
N2 - The certification of reference materials (CRMs) is one of the main tasks of the BAM Federal Institute for Materials Research and Testing. In this context CRMs for analytical chemistry play the dominant role. Traditionally, energy dispersive X-ray fluorescence (EDXRF) has been excluded from the final certification scheme. It has lacked the proof to be reliable enough due to peak overlapping and risks of incorrect background subtraction leading to unacceptable uncertainty and bias of the results. The development described aims at enabling ED-SRXRF to really contribute to certification by the aid of synchrotron radiation. This has been partly shown for macrocontents and has been successfully demonstrated for trace elements and thin layers. The method is based on a combination of measurements of pure elements or stoichiometric compounds as comparator materials and Monte Carlo simulations. Measurements have been performed at the BAMline, the hard X-ray beam line of the BAM at the synchrotron BESSY II in Berlin.
KW - SyXRF Quantifizierung
KW - Monte Carlo Simulation
KW - Referenzmaterialien
PY - 2010
DO - https://doi.org/10.1039/b926596a
SN - 0267-9477
SN - 1364-5544
VL - 25
IS - 5
SP - 631
EP - 634
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-22895
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - XRF using synchrotron radiation
T2 - Vienna summer school 2010 "Radiation physics in cultural heritage studies"
CY - Vienna, Austria
DA - 2010-09-21
PY - 2010
AN - OPUS4-23263
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Synchrotronstrahlung für die Untersuchung von Kunstobjekten
T2 - DGZfP Arbeitskreis Dresden
CY - Dresden, Germany
DA - 2010-12-09
PY - 2010
AN - OPUS4-23264
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Röntgenfluoreszenzanalyse mit Synchrotronstrahlung an der Bundesanstalt für Materialforschung und -prüfung (BAM), Berlin
T2 - Seminar: "Strahlenphysikalische Anwendungen in Technik und Medizin"
CY - Vienna, Austria
DA - 2011-01-19
PY - 2011
AN - OPUS4-23265
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Hodoroaba, Vasile-Dan
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Vincze, L.
A1 - Reuter, Dirk
T1 - X-ray scattering in X-ray fluorescence spectra with X-ray monochromatic, polarised excitation - modelling, experiment, and Monte-Carlo simulation
N2 - A systematic series of measurements has been carried out with monochromatic X-ray excitation with synchrotron radiation in order to check a physical model on X-ray scattering. The model has recently been successfully tested for the case of polychromatic, unpolarised excitation emitted by an X-ray tube. Our main purpose is the modelling of a physical background in X-ray fluorescence spectra, so that improved quantitative results can be achieved especially for strongly scattering specimens. The model includes single Rayleigh and Compton scattering in the specimen, the effect of bound electrons, the challenging Compton broadening and the polarisation degree. Representative specimens, measurement geometries and excitation energies have been selected with synchrotron monochromatic light at BAMline/BESSY II. Monte-Carlo simulations have been also carried out in order to evaluate the quality of the results achieved with the model.
KW - X-ray scattering
KW - Monochromatic excitation
KW - Polarisation
KW - Modelling
KW - Monte-Carlo simulation
PY - 2011
DO - https://doi.org/10.1016/j.nimb.2011.04.009
SN - 0168-583X
SN - 1872-9584
VL - 269
IS - 13
SP - 1493
EP - 1498
PB - Elsevier
CY - Amsterdam
AN - OPUS4-23765
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Gauert, C.
A1 - Schannor, M.
A1 - Hecht, L.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
T1 - A comparison of in situ analytical methods for trace element measurement in gold samples from various South African gold deposits
N2 - Trace element concentrations in gold grains from various geological units in South Africa were measured in situ by field emission-electron probe microanalysis (FE-EPMA), laser ablation-inductively coupled plasma-mass spectrometry (LA-ICP-MS) and synchrotron micro X-ray fluorescence spectroscopy (SR-µ-XRF). This study assesses the accuracy, precision and detection limits of these mostly non-destructive analytical methods using certified reference materials and discusses their application in natural sample measurement. FE-EPMA point analyses yielded reproducible and discernible concentrations for Au and trace concentrations of S, Cu, Ti, Hg, Fe and Ni, with detection limits well below the actual concentrations in the gold. LA-ICP-MS analyses required larger gold particles (> 60 µm) to avoid contamination during measurement. Elements that measured above detection limits included Ag, Cu, Ti, Fe, Pt, Pd, Mn, Cr, Ni, Sn, Hg, Pb, As and Te, which can be used for geochemical characterisation and gold fingerprinting. Although LA-ICP-MS measurements had lower detection limits, precision was lower than FE-EPMA and SR-µ-XRF. The higher variability in absolute values measured by LA-ICP-MS, possibly due to micro-inclusions, had to be critically assessed. Non-destructive point analyses of gold alloys by SR-µ-XRF revealed Ag, Fe, Cu, Ni, Pb, Ti, Sb, U, Cr, Co, As, Y and Zr in the various gold samples. Detection limits were mostly lower than those for elements measured by FE-EPMA, but higher than those for elements measured by LA-ICP-MS.
N2 - Les concentrations en éléments traces de grains d'or provenant de différentes unités géologiques d'Afrique du Sud ont été mesurées in situ par microsonde électronique à émission de champ (FE-EPMA), spectrométrie de masse couplée à une source plasma et un système d'ablation laser (LA-ICP-MS) et micro spectroscopie de fluorescence des rayons X au Synchrotron (SR-µ-XRF). Cette étude évalue l'exactitude, la précision et les limites de détection de ces méthodes d'analyse pour la plupart non-destructives en utilisant des matériaux de référence certifiés, et discute de leur application dans les mesures sur échantillon naturel. Les points d'analyses FE-EPMA ont fournis des concentrations reproductibles et discernables pour l'Au et des concentrations en traces de S, Cu, Ti, Hg, Fe et Ni, avec des limites de détection bien inférieures aux concentrations réelles dans l'or. Les analyses LA-ICP-MS ont nécessitées des particules d'or de plus grande taille (> 60 µm) pour éviter toute contamination pendant la mesure. Les éléments mesurés au-dessus des limites de détection inclus Ag, Cu, Ti, Fe, Pt, Pd, Mn, Cr, Ni, Sn, Hg, Pb, A et Te, qui peuvent être utilisés pour les caractérisations géochimique et le «fingerprinting» de l'or. Bien que les mesures LA-ICP-MS aient des limites de détection plus basses, la précision est inférieure par rapport à celles de la microsonde FE et de la SR-µ-XRF. La plus grande variabilité des valeurs absolues mesurées par LA-ICP-MS, probablement reliée à la présence de micro-inclusions, a du être évaluée de manière critique. Les points d'analyse non-destructifs des alliages d'or par SR-µ-XRF ont révélés la présence de Ag, Fe, Cu, Ni, Pb, Ti, Sb, U, Cr, Co, As, Y et Zr dans les différents échantillons. Les limites de détection ont été pour la plupart inférieures à celles des éléments mesurés par FE-EPMA, mais supérieures à celles des éléments mesurés par LA-ICP-MS.
KW - Trace elements
KW - Gold
KW - FE-EPMA
KW - LA-ICP-MS
KW - SR-µ-XRF
KW - Precision
KW - Précision
KW - Comparison of techniques
KW - Éléments traces
PY - 2016
DO - https://doi.org/10.1111/j.1751-908X.2015.00362.x
SN - 1639-4488
SN - 1751-908X
VL - 40
IS - 2
SP - 267
EP - 289
PB - Blackwell
CY - Oxford
AN - OPUS4-34882
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Emmerling, Franziska
ED - de Oliveira Guilherme Buzanich, Ana
ED - Strange, R. W.
T1 - Time- and spatial-resolved XAFS spectroscopy in a
single shot: new analytical possibilities for in situ
material characterization
N2 - A new concept that comprises both time- and lateral-resolved X-ray absorption fine-structure information simultaneously in a single shot is presented. This uncomplicated set-up was tested at the BAMline at BESSY-II (Berlin, Germany). The primary broadband beam was generated by a double multilayer monochromator. The transmitted beam through the sample is diffracted by a convexly bent Si (111) crystal, producing a divergent beam. This, in turn, is collected by either an energy-sensitive area detector, the so-called color X-ray camera, or by an area-sensitive detector based on a CCD camera, in θ–2θ geometry. The first tests were performed with thin metal foils and some iron oxide mixtures. A time resolution of lower than 1 s together with a spatial resolution in one dimension of at least 50 mm is achieved.
KW - Single-shot XAFS
KW - Time resolution
PY - 2016
UR - http://scripts.iucr.org/cgi-bin/paper?S1600577516003969
DO - https://doi.org/10.1107/S1600577516003969
SN - 1600-5775
VL - 23
SP - 769
EP - 776
PB - International Union of Crystallography
CY - Liverpool, UK
AN - OPUS4-35903
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Radtke, Martin
A1 - Buzanich, Günter
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Scharf, O.
A1 - Scholz, Philipp
A1 - Guerra, M.F.
T1 - Double Dispersive X-Ray Fluorescence (D2XRF) based on an Energy Dispersive pnCCD detector for the detection of platinum in gold
N2 - With the aim of improving limits of detection (LOD) of trace elements in a matrix with adjacent fluorescence energies, a simple double dispersive X-ray fluorescence detection system (D2XRF) was constructed to operate at the beamlines BAMline and the mySpot @ BESSY II. This system is based on the combination of a crystal analyzer with an energy resolving single photon counting pnCCD. Without further collimators, the efficient suppression of the background by the pnCCD and the good energy resolution of the crystal results in improved LOD. In first order reflections, an energy resolution of 13 eV for Cu Kα was reached, and an energy range of 1 keV was covered in one shot.
This new system was applied to the detection of platinum (Pt) in gold leaves with a LOD of 0.9 mg/kg, which is the lowest attained by totally non-destructive methods nowadays. The presence of Pt in gilded objects from Abydos and Byzantine mosaics provides vital information, as it indicates the alluvial origin of the gold for these examples.
KW - Platinum Wavelength dispersive D2XRF
KW - Gold Synchrotron XRF
PY - 2016
DO - https://doi.org/10.1016/j.microc.2015.10.039
VL - 125
SP - 56
EP - 61
PB - Elsevier Science
CY - Amsterdam
AN - OPUS4-35777
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Menzel, M.
A1 - Scharf, O.
A1 - Novak, S.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Hischenhuber, P.
A1 - Buzanich, Günter
A1 - Meyer, A.
A1 - Lopez, V.
A1 - McIntosh, K.
A1 - Streli, C.
A1 - Havrilla, G.
A1 - Fittschen, U.
T1 - Shading in TXRF: calculations and experimental validation using a color X-ray camera
N2 - Absorption effects in total reflection X-ray fluorescence (TXRF) analysis are important to consider, especially if external calibration is to be applied. With a color X-ray camera (CXC), that enables spatially and energy resolved XRF analysis, the absorption of the primary beam was directly visualized for mL-droplets and an array of pL-droplets printed on a Si-wafer with drop-on-demand technology. As expected, deposits that are hit by the primary beam first shade subsequent droplets, leading to a diminished XRF signal. This shading effect was quantified with enhanced precision making use of sub-pixel analysis that improves the spatial resolution of the camera. The measured absorption was compared to simulated results using three different model calculations. It was found they match very well (average deviation < 10%). Thus errors in quantification due to absorption effects can be accounted for in a more accurate manner.
KW - absorption
KW - X-ray Fluorescence analysis
PY - 2015
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-359000
DO - https://doi.org/10.1039/C5JA00127G
IS - 10
SP - 2184
EP - 2193
PB - Royal Society of Chemistry
CY - Cambridge
AN - OPUS4-35900
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Emmerling, Franziska
T1 - Time- & spatial-resolved X-ray absorption fine structure (XAFS) spectroscopy in a single-shot – new analytical possibilities for in situ material characterization
N2 - A new concept that comprises both time- and lateral-resolved X-ray absorption fine-structure information simultaneously in a single shot is presented. This uncomplicated set-up was tested at the BAMline at BESSY-II (Berlin, Germany). The primary broadband beam was generated by a double multilayer monochromator. The transmitted beam through the sample is diffracted by a convexly bent Si (111) crystal, producing a divergent beam. This, in turn, is collected by either an energy-sensitive area detector, the so-called color X-ray camera, or by an area-sensitive detector based on a CCD camera, in θ-2θ geometry. The first tests were performed with thin metal foils and some iron oxide mixtures. A time resolution of lower than 1 s together with a spatial resolution in one dimension of at least 50 µm is achieved.
KW - Time resolution
KW - Single-shot XAFS
PY - 2016
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-370892
DO - https://doi.org/10.1107/S1600577516003969
SN - 1600-5775
IS - 23
SP - 769
EP - 776
PB - International Union of Crystallography
CY - Chester, UK
AN - OPUS4-37089
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Materials research with synchrotron radiation
N2 - Synchrotron radiation sources with their unique properties in terms of intensity, polarization and adjustability offer a wide range of possibilities in materials research. A basic introduction about the creation and special properties of synchrotron radiation will be given. Examples of current work at BAMline, the high-energy measuring facility of the Federal Institute for Materials Research and Testing at the synchrotron BESSY, are used to illustrate the possibilities and limitations of existing measuring methods. It will be shown how the formation of corrosion layers can be tracked, how the abrasion of implants leads to the introduction of heavy metals into the surrounding bone matrix and how the detection of smallest impurities in gold is possible by optimizing the measuring conditions. Finally, an outlook at the hardware and software developments to be expected in the coming years is given.
T2 - INCT-FNA Symposium 2019
CY - Niteroi, Brazil
DA - 27.05.2019
KW - Synchrotron
KW - XRF
KW - XANES
KW - EXAFS
KW - TXRF
KW - Color X-ray Camera
PY - 2019
AN - OPUS4-48897
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Fittschen, U.E.A.
A1 - Möckel, R.
A1 - Schreiner, M.
A1 - klinger, M.
A1 - Radtke, Martin
A1 - Meyer, B.
A1 - Guhl, S.
A1 - Renno, A.
A1 - Godinho, J.
A1 - Gloaguen, R.
A1 - Gutzmer, J.
T1 - Bundling analytical capacities to understand phase formation in recycling of functional materials
N2 - Transitioning from combustion engine-driven transportation to e-mobility demands a paradigm shift – from a system geared to maximize energy efficiency (i.e. fuel consumption) to a system that may be constrained by the availability of high technology (critical) metals required for electrical energy storage systems and drives. In the wake of these developments efforts in securing new resources of these metals from recycling of end-of-life products are increasing steadily.
Recycling of Li-Ion batteries has recently been evaluated. The results pinpoint to a critical need for understanding slag Formation and its dependence on metal components like Mn under extreme conditions. This will allow researchers to predict optimal Operation setting and to react quickly to changing market demands (which may be Li or Co at one point but may also shift to Ni or rare earth elements (REE)). The long-term goal is to control the formation of specific phases in slags allowing for a Maximum yield of elements of interest and optimal recovery in the separation processes that follows. The combination of data on the physical micro structure and local chemistry of the multi-Phase products during and after processing will help to understand and derive thermodynamic and kinetic data on its formation.
In this paper we are giving an overview on the analytical challenges and approaches to provide robust data on local element concentration and species (especially Mn which is a common component of next generation Li-ion batteries cathodes), spanning the dimensions from the nanometer scale to the bulk material. The complementary interactions of X-rays and electrons make them ideal probes to collect Interface and “in-depth” information. Before- and -after studies as well as in situ structural changes and Phase (trans)formation, changes in elemental and elemental species (e.g. oxidation state) distribution may be tracked by X-ray diffraction (XRD), X-ray fluorescence microscopy and X-ray Absorption spectroscopy. The application of such advanced analytical tools will not only provide essential clues during early lab-based experiments towards the development of new recycling technologies, but may also be deployed for on-line and in-line monitoring of industrial processes.
KW - Synchrotron
KW - XANES
KW - Slags
KW - Battery
PY - 2019
DO - https://doi.org/10.4028/www.scientific.net/MSF.959.183
SN - 1662-9752
VL - 959
SP - 183
EP - 190
PB - Trans Tech Publ.
AN - OPUS4-48900
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Machine learning for direct quantification of XRF measurements
N2 - In X-ray fluorescence (XRF), a sample is excited with X-rays, and the resulting characteristic radiation is detected to detect elements quantitatively and qualitatively. Quantification is traditionally done in several steps:
1. Normalization of the data
2. Determination of the existing elements
3. Fit of the measured spectrum
4. Calculation of concentrations with fundamental parameters / MC simulations / standard based
The problem with standard based procedures is the availability of corresponding standards. The problem with the calculations is that the measured intensities for XRF measurements are matrix-dependent. Calculations must, therefore, be performed iteratively (= time consuming) in order to determine the chemical composition.
First experiments with gold samples have shown the feasibility of machine learning based quantification in principle. A large number of compositions were simulated (> 10000) and analyzed with a deep learning network. For first experiments, an ANN (Artificial Neural Network) with 3 hidden layers and 33x33x33 neurons was used. This network learned the mapping of spectra to concentrations using supervised learning by multidimensional regression. The input layer was formed by the normalized spectrum, and the output layer directly yielded the searched values. The applicability for real samples was shown by measurements on certified reference materials.
T2 - Denver X-ray Conference
CY - Lombard, IL, USA
DA - 05.08.2019
KW - Machine learning
KW - Artificial intelligence
KW - Neural network
KW - XRF
KW - Synchrotron
PY - 2019
AN - OPUS4-48903
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - De Samber, B.
A1 - Scharf, Oliver
A1 - Buzanich, Günter
A1 - Garrevoet, J.
A1 - Tack, P.
A1 - Radtke, Martin
A1 - Riesemeier, Heinrich
A1 - Reinholz, Uwe
A1 - Evens, R.
A1 - De Schamphelaere, K.
A1 - Falkenberg, G.
A1 - Janssen, C.
A1 - Vincze, L.
T1 - Three-dimensional X-ray fluorescence imaging modes for biological specimens using a full-field energy dispersive CCD camera
N2 - Besides conventional scanning X-ray fluorescence imaging at synchrotron sources, full-field X-ray fluorescence (FF-XRF) imaging techniques that do not implicitly require spatial scanning of the sample have become available. FF-XRF has become achievable thanks to the development of a new type of energy dispersive CCD-based 2D detector, also referred to as a 'color X-ray camera (CXC)' or 'SLcam'. We report on different imaging schemes for biological samples using FF-XRF imaging: (a) 2D 'zoom' imaging with pinhole optics using the 'camera obscura' principle; (b) 2D 'fixed magnification' imaging using magnifying polycapillary optics; and (c) 3D-FF-XRF imaging using an X-ray sheet beam or computed tomography (CT). The different FF-XRF imaging modes are illustrated using the crustacean Daphnia magna, a model organism for investigating the effects of metals on organism/ecosystem health, and foraminifera, a class of amoeboid protist. Detailed analytical characterization of the set-up is performed through analyzing various reference materials in order to determine limits of detection (LODs) and sensitivities. Experiments were performed using the BAMline at the BESSY synchrotron (Berlin, Germany) and using the P06 Hard X-ray Microprobe at the PETRAIII synchrotron (Hamburg, Germany).
KW - CXC
KW - BAMline
KW - Maia detector
KW - Synchrotron
PY - 2019
DO - https://doi.org/10.1039/c9ja00198k
VL - 34
IS - 10
SP - 2083
EP - 2093
PB - Royal Society of Chemistry
CY - Cambridge, United Kingdom
AN - OPUS4-49359
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Yusenko, Kirill
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
T1 - Studies of high-entropy alloys using x-ray absorption fine structure at the bamline
N2 - BAM line is multipurpose high-energy beamline. To extend studies of multicomponent alloys using EXAFS we perform own research and user experiments requiring multiedge spectroscopy, high-temperature and chemically aggressive sample environments. Our study of multicomponent alloys and high-entropy alloys open new perspectives in understanding their reactivity, corrosion, phase transformations and local ordering.
T2 - SPP2006: large scale facilities
CY - Online meeting
DA - 02.11.2021
KW - Synchrotron studies
KW - High-entropy alloys
KW - EXAFS
PY - 2021
AN - OPUS4-54016
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Lutz, C.
A1 - Hampel, S.
A1 - Beuermann, S.
A1 - Turek, T.
A1 - Kunz, U.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Fittschen, U. E. A.
T1 - Investigation on Vanadium Species Distribution in Nafion™ 117 after Cyclization in a Vanadium Redox Flow Battery
N2 - The vanadium redox flow battery (VRFB) is currently a potential candidate for stationary energy storage. A major challenge is the unintended vanadium transport through the separator, which results in a fade of capacity. To overcome this issue, it is necessary to understand the transport processes in the membrane on a more fundamental level. In this work, the vanadium species distribution in Nafion™ 117 after cyclization was investigated. Two membranes, one from a charged VRFB and another from a discharged VRFB, were analyzed using ultraviolet–visible spectroscopy (UV/VIS) and X-ray absorption near edge structure spectroscopy (XANES). Little difference between the two membranes was recognizable according to the UV/VIS results. In comparison, the XANES results showed that the membrane from the charged VRFB contains more V3+ than VO2+, whereas for the discharged case, more VO2+ is present in the membrane.
KW - Synchrotron
KW - BAMline
KW - XANES
KW - Vanadium redox flow battery
PY - 2021
VL - 64
SP - 1
EP - 8
AN - OPUS4-54144
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Das goldene Zeitalter war damals Analyse von Gold mit Synchrotronstrahlung
N2 - Gold ist eines der sieben bereits in der Antike bekannten Metalle und wurde wegen seines Glanzes und seiner Seltenheit seit jeher als Tauschmittel und zur Herstellung von Schmuck verwendet. Außerdem ist es leicht zu bearbeiten und weitgehend resistent gegen chemische Einflüsse.
Die Analyse von Gold mit der durch Synchrotronstrahlung angeregten Röntgenfluoreszenzanalyse ist zerstörungsfrei und liefert Informationen über die in der untersuchten Probe vorhandenen chemischen Elemente.
Im Mittelpunkt der hier vorgestellten Untersuchungen an der BAMline stehen Fragen nach der Herkunft, dem Herstellungsprozess und der Zugehörigkeit von Goldfunden. Die verschiedenen Fragestellungen werden anhand einer Reihe von Beispielen erläutert, die vom Wikingerschatz von Hiddensee über die Himmelsscheibe von Nebra bis hin zu Funden aus Ägypten reichen. Darüber hinaus werden die heute am Synchrotron verfügbaren modernen Messmethoden vorgestellt.
T2 - WISSENSCHAFT MIT WIRKUNG: Workshop Kulturguterhaltung – vom Dampfkessel zu Nanomaterialien
CY - Berlin, Germany
DA - 17.11.2021
KW - Gold
KW - Synchrotron
KW - Bernstorf
KW - Nebra
KW - XRF
PY - 2021
AN - OPUS4-54139
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Machine learning for direct quantification of XRF measurements
N2 - In this talk I’ll describe the use of artificial neural networks (ANN) for quantifying X-ray fluorescence (XRF) measurements. The main idea of this talk is to give an overview of the process needed to generate a model that can then be applied to a specific problem.
In XRF, a sample is excited with X-rays and the resulting characteristic radiation is detected to determine elements quantitatively and qualitatively. This is traditionally done in several time-consuming steps. I’ll show the possibilities and problems of using a neural network to realise a "one-click" quantification. This includes generating training data using Monte Carlo simulation and augmenting the existing data set with an ANN to generate more data. The search for the optimal hyperparameters, manually and automatically, is also described. For the case presented, we were able to train a network with a mean absolute error of 0.1% by weight for the synthetic data and 0.7% by weight for a set of experimental data obtained with certified reference materials.
T2 - Seminar series: Artificial Intelligence applied to X-ray / synchrotron techniques
CY - Online meeting
DA - 24.06.2021
KW - Artificial intelligence
KW - Machine learning
KW - Synchrotron
KW - XRF
PY - 2021
AN - OPUS4-54140
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - ML@BAMLINE
N2 - An overview of the machine learning methods used at BAMline. Examples of automatic alignment and optimisation based on Gaussian processes are discussed. Quantification of XRF measurements and reconstruction for coded aperture imaging based on neural networks are also presented.
T2 - Machine Learning Workshop BAM
CY - Online meeting
DA - 18.03.2021
KW - Artificial Intelligence
KW - Machine learning
KW - Bayesian Optimization
KW - Gaussian process
KW - Neural Network
PY - 2021
AN - OPUS4-54142
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Kulow, Anicó
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Reinholz, Uwe
A1 - Emmerling, Franziska
A1 - Hampel, S.
A1 - Fittschen, U.E.A.
A1 - Streli, C.
A1 - Radtke, Martin
T1 - Comparison of three reconstruction methods based on deconvolution, iterative algorithm and neural network for X-ray fluorescence imaging with coded apertures
N2 - X-ray imaging methods are used in many fields of research, as they allow a non-destructive Investigation of the elemental content of various samples. As for every imaging method, for X-ray imaging the optics are of crucial importance. However, these optics can be very expensive and laborious to build, as the requirements on surface roughness and precision are extremely high. Angles of reflection and refraction are often in the range of a few mrad, making a compact design hard to achieve. In this work we present a possibility to simplify X-ray imaging. We have adapted the coded aperture method, a high energy radiation imaging method that has its origins in astrophysics, to full field X-ray fluorescence imaging. In coded aperture imaging, an object is projected through a known mask, the coded aperture, onto an area sensitive detector. The resulting image consists of overlapping projections of the object and a reconstruction step is necessary to obtain the information from the recorded image. We recorded fluorescence images of different samples with an energy-dispersive 2D detector (pnCCD) and investigated different reconstruction methods. With a small coded aperture with 12 holes we could significantly increase the count rate compared to measurements with a straight polycapillary optic. We show that the reconstruction of two different samples is possible with a deconvolution approach, an iterative algorithm and a neural network. These results demonstrate that X-ray fluorescence imaging with coded apertures has the potential to deliver good results without scanning and with an improved count rate, so that measurement times can be shortened compared to established methods.
KW - X-ray fluorescence imaging
KW - Coded apertures
KW - Imaging
KW - Elemental mapping
KW - Image reconstruction
PY - 2020
DO - https://doi.org/10.1039/d0ja00146e
VL - 35
IS - 7
SP - 1423
EP - 1434
PB - Royal Society of Chemistry
CY - United Kingdom
AN - OPUS4-51518
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Reifschneider, O.
A1 - Vennemann, A.
A1 - Buzanich, Günter
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, Heinrich
A1 - Hogeback, J
A1 - Köppen, C.
A1 - Großgarten, M.
A1 - Sperling, M.
A1 - Wiemann, M.
A1 - Karst, U.
T1 - Revealing Silver Nanoparticle Uptake by Macrophages Using SR-μXRF and LA-ICP-MS
N2 - To better study the impact of nanoparticles on both in vitro and in vivo models, tissue distribution and cellular doses need to be described more closely. Here silver nanoparticles were visualized in alveolar macrophages by means of synchrotron radiation micro X-ray fluorescence spectroscopy (SR-μXRF) with high spatial resolution of 3 × 3 μm2. For the spatial allocation of silver signals to cells and tissue structures, additional elemental labeling was carried out by staining with eosin, which binds to protein and can be detected as bromine signal with SR-μXRF. The method was compatible with immunostaining of macrophage antigens. We found that the silver distribution obtained with SR-μXRF was largely congruent with distribution maps from a subsequent laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) of the same tissue sites. The study shows a predominant, though not exclusive uptake of silver into alveolar macrophages in the rat lung, which can be modeled by a similar uptake in cultured alveolar macrophages. Advantages and limitations of the different strategies for measuring nanoparticle uptake at the single cell level are discussed.
KW - Synchrotron
KW - BAMline
KW - XRF
KW - Nanoparticle
KW - Macrophagen
PY - 2020
DO - https://doi.org/10.1021/acs.chemrestox.9b00507
VL - 33
IS - 5
SP - 1250
EP - 1255
PB - American Chemical Society
AN - OPUS4-50855
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Kulow, Anicó
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Reinholz, Uwe
A1 - Streli, C.
A1 - Radtke, Martin
T1 - On the way to full-field X-ray fluorescence spectroscopy imaging with coded apertures
N2 - Imaging with X-rays is a challenging field, due to the optical properties of X-rays. The fabrication of appropriate optics is usually expensive and requires an elaborate manufacturing process. One simpler and less expensive possibility of imaging high energy radiation is coded aperture imaging, a technique well established in astrophysics and also used in nuclear medicine or radiation detection, e.g., for nuclear decommissioning. Our aim is to adapt coded aperture imaging for X-ray fluorescence spectroscopy in the nearfield. In this work we show theoretical considerations and preliminary simulations of Image formation through a coded aperture and three different reconstruction methods to prepare the experiments. We used a new mask based on an inverted modified uniformly redundant array (MURA) that could be used for the construction of a decoding mask for all investigated geometrical arrangements.
The most commonly used reconstruction method, convoluting the detected image with a Decoding mask, does not always deliver satisfactory results. This is more noticeable for small distances between the object, mask and detector. Hence, we developed two new reconstruction methods, one based on iterative algebraic optimization and another one based on a genetic algorithm. Both show good performance even in those cases where the convolution method fails. This provides a basis for further investigations of the ideal parameters for near field coded aperture imaging and refinements of the algorithms. We performed first measurements with a coded aperture at the BAMline at BESSY II and could successfully reconstruct a test object from the obtained recorded images.
KW - X-ray fluorescence spectroscopy
KW - Coded aperture
KW - Imaging
KW - Iterative reconstruction
PY - 2020
DO - https://doi.org/10.1039/c9ja00232d
VL - 35
IS - 2
SP - 347
EP - 356
PB - Royal Society of Chemistry
CY - Cambridge
AN - OPUS4-50459
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Grengg, C.
A1 - Gluth, Gregor
A1 - Mittermayr, F.
A1 - Ukrainczyk, N.
A1 - Bertmer, M.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Leis, A.
A1 - Dietzel, M.
T1 - Deterioration mechanism of alkali-activated materials in sulfuric acid and the influence of Cu: A micro-to-nano structural, elemental and stable isotopic multi-proxy study
N2 - In this study, a multi-proxy approach combining 29Si, 27Al and 1H MAS-NMR, FEG-EPMA, XANES at the Cu K-edge and XRD analytics with hydrochemical tools such as ICP-OES analyses, oxygen-isotope signatures, and thermodynamic modelling was applied to K-silicate-activated metakaolin specimens - with and without CuSO4·5H2O addition - exposed to sulfuric acid at pH = 2 for 35 days. The results revealed a multistage deterioration mechanism governed by (i) acid diffusion, (ii) leaching of K-A-S-H, (iii) microstructural damage related to precipitation of expansive (K,Ca,Al)-sulfate-hydrate phases (iv) complete dissolution of the K-A-S-H framework, (v) and formation of silica gel in the outermost corroded regions. Copper ions were mainly located in layered spertiniite-chrysocolla-like phases in the as-cured materials. The results demonstrate an overall negative effect of Cu addition on chemical material durability, implying that the reported higher durability of Cu-doped AAM in biocorrosion environments can be best explained by bacteriostatic effects.
KW - Alkali-activated materials
KW - Acid resistance
KW - Microbially induced corrosion
KW - MIC
PY - 2021
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-520567
DO - https://doi.org/10.1016/j.cemconres.2021.106373
SN - 0008-8846
VL - 142
SP - 1
EP - 15
PB - Elsevier
CY - Oxford
AN - OPUS4-52056
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - GEN
A1 - Maack, Stefan
A1 - Bertovic, Marija
A1 - Radtke, Martin
A1 - et al.,
ED - Wahlster, W.
ED - Winterhalter, C.
T1 - Deutsche Normungsroadmap künstliche Intelligenz
N2 - Rund ein Jahr haben DIN und DKE in einem gemeinsamen Projekt mit dem Bundesministerium für Wirtschaft und Energie und zusammen mit ca. 300 Fachleuten aus Wirtschaft, Wissenschaft, öffentlicher Hand und Zivilgesellschaft an der Normungsroadmap Künstliche Intelligenz gearbeitet. Eine hochrangige Steuerungsgruppe unter dem Vorsitz von Prof. Wolfgang Wahlster hat die Erarbeitung koordiniert und begleitet.
Ziel der Roadmap ist die frühzeitige Entwicklung eines Handlungsrahmens für die Normung und Standardisierung, der die internationale Wettbewerbsfähigkeit der deutschen Wirtschaft unterstützt und europäische Wertmaßstäbe auf die internationale Ebene hebt.
KW - Künstliche Intelligenz
KW - Normung
KW - Roadmap
PY - 2020
UR - https://www.din.de/resource/blob/772438/ecb20518d982843c3f8b0cd106f13881/normungsroadmap-ki-data.pdf
VL - 2020
SP - 1
EP - 232
PB - Deutsches Institut für Normung (DIN)
CY - Berlin
ET - 1.
AN - OPUS4-51733
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Trace element analysis with synchrotron radiation
N2 - Trace elements are chemical elements whose concentration in a material is very low. The exact definition depends on the application and varies for example between 100 micrograms per gram in analytical chemistry and 1000 micrograms per gram in geology. The ability to detect trace elements fast and quantitatively is of great importance in many areas of science and technology. With its high brilliance and flexibility in the excitation conditions, synchrotron radiation is an ideal tool for detecting traces even in small sample quantities. In this contribution I will report about the use of X-ray fluorescence(XRF)for qualitative and quantitative element sensitiveanalysis. In addition to the fundamentals of XRF and its quantification methods, the advantages and problems of different geometries like e.g. microXRF, Total Reflection X-ray Fluorescence (TXRF)or Double Dispersive XRF (D²XRF) will be discussed. Practical examples from BAMline from the research fields of medicine, geology and archaeometry will complete the lecture.
T2 - Denver X-Ray Conference
CY - Online meeting
DA - 03.08.2020
KW - Synchrotron
KW - BAMline
KW - XRF
PY - 2020
AN - OPUS4-51890
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Artificial intelligence for spectroscopy examples from BAMline
N2 - Various applications for artificial intelligence in the context of spectroscopy will be presented. in particular, examples from bamline will be featured. After a short introduction to synchrotron radiation, artificial intelligence algorithms for the quantification of X-ray fluorescence measurement are discussed. In the second example, information retrieval by natural language processing is reviewed. As a last example the reconstruction of measurements with the X-ray color camera and coded apertures is presented.
T2 - Seminar Strahlenphysikalische Anwendungen in Technik und Medizin
CY - ATi Wien, Austria
DA - 22.01.2020
KW - Machine learning
KW - Natural language processing
KW - Neural networks
KW - Synchrotron
KW - BAMline
PY - 2020
AN - OPUS4-51891
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Von Ägypten bis Hiddensee Analyse von Gold mit Synchrotronstrahlung III
N2 - Gold ist eines der sieben schon im Altertum bekannten Metalle und wurde wg. seines Glanzes und seiner Seltenheit von alters her als Tauschmittel und zur Herstellung von Schmuck benutzt. Außerdem ist es einfach bearbeitbar und weitestgehend gegen chemische Einflüsse resistent. Die Untersuchungen von Gold mit synchrotronstrahlungsangeregter Röntgenfluoreszenzanalyse sind zerstörungsfrei und geben Auskunft über die in der untersuchten Probe vorhandenen chemischen Elemente. Bei den hier vorgestellten Untersuchungen an der BAMline stehen Fragestellungen wie Herkunft, Herstellungsverfahren und Zusammengehörigkeit von Goldfunden im Vordergrund. Die verschiedenen Fragestellungen werden an einer Reihe von Beispielen erläutert die vom Wikingerschatz aus Hiddensee über die Himmelsscheibe von Nebra bis hin zu Funden aus Ägypten langen. Der Fund von Bernstorf wird ausführlich diskutiert.
T2 - Vorlesung FU Berlin Einführung in die Archäometrie
CY - Berlin, Germany
DA - 06.11.2020
KW - Synchrotron
KW - BAMline
KW - XRF
KW - Gold
KW - Archäometrie
PY - 2020
AN - OPUS4-51893
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - X-Ray fluorescence with synchrotron radiation basics and applications
N2 - In this talk, the features of X-ray fluorescence analysis with synchrotron radiation will be presented. First, the basics of the origin of synchrotron radiation and X-ray fluorescence analysis and the experimental setup will be discussed. Then, examples of trace element detection, micrometer resolution, and application of the X-ray color camera will be shown.
T2 - HZB Photon school 2020
CY - Berlin, Germany
DA - 09.03.2020
KW - Synchrotron
KW - BAMline
KW - XRF
KW - Machine learning
PY - 2020
AN - OPUS4-51894
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - SRXRF examples from the BAMline
N2 - Synchrotron radiation sources with their unique properties in terms of intensity, polarization and adjustability offer a wide range of possibilities in materials research. A basic introduction about the creation and special properties of synchrotron radiation will be given. Examples of current work at BAMline, the high-energy measuring facility of the Federal Institute for Materials Research and Testing at the synchrotron BESSY, are used to illustrate the possibilities and limitations of existing measuring methods.
T2 - Better with Scattering
CY - Online meeting
DA - 16.03.2020
KW - Synchrotron
KW - BAMline
KW - XRF
PY - 2020
AN - OPUS4-51895
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Machine learning: examples from BAMline
N2 - Various applications for artificial intelligence in the context of spectroscopy will be presented. in particular, examples from BAMline will be presented. After a short introduction to synchrotron radiation, artificial intelligence algorithms for the quantification of X-ray fluorescence measurement are discussed. In the second example, information retrieval by natural language processing is discussed.
T2 - Analytical Academy
CY - Online meeting
DA - 02.06.2020
KW - Machine learning
KW - BAMline
KW - XRF
KW - Synchrotron
PY - 2020
AN - OPUS4-51898
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Radtke, Martin
A1 - Rakotondrajoa, A.
T1 - Machine learning based quantification of synchrotron radiation-induced X-ray fluorescence measurements - a case study
N2 - In this work, we describe the use of artificial neural networks for the quantification of X-ray fluorescence measurements. The training data were generated using Monte Carlo simulation, which avoided the use of adapted reference materials. The extension of the available data set by means of an ANN to generate additional data was demonstrated. Particular emphasis was put on the comparability of simulated and experimental data and how the influence of deviations can be reduced. The search for the optimal hyperparameter, manual and automatic, is also described. For the presented case, we were able to train a network with a mean absolute error of 0.1 weight percent for the synthetic data and 0.7 weight percent for a set of experimental data obtained with certified reference materials.
KW - Machine learning
KW - BAMline
KW - XRF
KW - Synchrotron
KW - Neural network
PY - 2020
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-519008
DO - https://doi.org/10.1088/2632-2153/abc9fb
SP - 1
EP - 16
PB - IOP Publishing
AN - OPUS4-51900
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Lutz, C.
A1 - Hampel, S.
A1 - Ke, X.
A1 - Beuermann, S.
A1 - Turek, T.
A1 - Kunz, U.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Fittschen, U.
T1 - Evidence for redox reactions during vanadium crossover inside the nanoscopic water-body of Nafion 117 using X-ray absorption near edge structure spectroscopy
N2 - A major source of capacity fade of the common vanadium redox flow battery (VRFB) is the vanadium ion transport through the separator. However, different transport models disagree significantly in the diffusion coefficient for the different V species and the influence of different transport mechanisms. The underlying hypothesis of this work is that reactions inside the membrane are partly responsible for these discrepancies. Accordingly, it was investigated if redox reactions inside the nanoscopic water body of Nafion 117 can occur. X-ray absorption near edge structure spectroscopy (XANES) was used to distinguish between the different V species inside hydrated Nafion 117 and novel PVDF-based membranes. It was validated that the speciation of vanadium can be performed using the pre-edge peak energy and intensity. The experiments were performed as follows: strips of the membrane were exposed from one site to a V3+ solution (green) and from the other site to a VO2+ solution (yellow). The ions could diffuse into the membrane from both sides. A change of color of the membrane strip was observed. The blue color in the middle of the strip indicated that VO2+ was formed where V3+ and VO2+ got in contact. Using XANES this reaction inside Nafion was proven.
KW - PVDF-Based membrane
KW - VRFB
KW - Vanadium speciation
KW - XANES
KW - Nafion 117
PY - 2020
DO - https://doi.org/10.1016/j.jpowsour.2020.229176
VL - 483
SP - 229176
PB - Elsevier B.V.
AN - OPUS4-51719
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Kulow, Anicó
A1 - Kabelitz, Anke
A1 - Grunewald, C.
A1 - Seidel, R.
A1 - Chapartegui-Arias, Ander
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Emmerling, Franziska
A1 - Beyer, S.
T1 - Observation of early ZIF-8 crystallization stages with X-ray absorption spectroscopy
N2 - The present study investigates early stages of ZIF-8 crystallization up to 5 minutes post mixing of precursor solutions. Dispersive X-ray Absorption Spectroscopy (DXAS) provides a refined understanding of the evolution of the coordination environment during ZIF-8 crystallization. Linear Combination Fiting (LCF) suggests tetrakis(1-methylimidazole)zinc2+ to be a suitable and stable mononuclear structure analogue for some early stage ZIF-8 intermediates. Our results pave the way for more detailed studies on physico-chemical aspects of ZIF-8 crystallization to better control tailoring ZIF-8 materials for specific applications.
KW - In-situ
KW - XANES
KW - ZIF-8
KW - Crystallization
PY - 2020
DO - https://doi.org/10.1039/D0SM01356K
SN - 1744-6848
VL - 17
IS - 2
SP - 331
EP - 334
PB - Royal Scociety of Chemistry
AN - OPUS4-51723
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Lutz, C.
A1 - Breuckmann, M.
A1 - Hampel, S.
A1 - Kreyenschmidt, M.
A1 - Ke, X.
A1 - Beuermann, S.
A1 - Schafner, K.
A1 - Turek, T.
A1 - Kunz, U.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Fittschen, U. E. A.
T1 - Characterization of Dimeric Vanadium Uptake and Species in Nafion™ and Novel Membranes from Vanadium Redox Flow Batteries Electrolytes
N2 - A core component of energy storage systems like vanadium redox flow batteries (VRFB) is the polymer electrolyte membrane (PEM). In this work, the frequently used perfluorosulfonic-acid (PFSA) membrane Nafion™ 117 and a novel poly (vinylidene difluoride) (PVDF)-based Membrane are investigated. A well-known problem in VRFBs is the vanadium permeation through the membrane. The consequence of this so-called vanadium crossover is a severe loss of capacity. For a
better understanding of vanadium transport in membranes, the uptake of vanadium ions from electrolytes containing Vdimer(IV–V) and for comparison also V(II), V(III), V(IV), and V(V) by both membranes was studied. UV/VIS spectroscopy, X-ray absorption near edge structure spectroscopy (XANES), total reflection X-ray fluorescence spectroscopy (TXRF), inductively coupled plasma optical emission spectrometry (ICP-OES), and micro X-ray fluorescence spectroscopy (microXRF) were used to determine the vanadium concentrations and the species inside the membrane. The results strongly support that Vdimer(IV–V), a dimer formed from V(IV) and V(V), enters the nanoscopic water-body of Nafion™ 117 as such. This is interesting, because as of now, only the individual ions V(IV) and V(V) were considered to be transported through the membrane. Additionally, it was found that the Vdimer(IV–V) dimer partly dissociates to the individual ions in the novel PVDF-based membrane.
The Vdimer(IV–V) dimer concentration in Nafion™ was determined and compared to those of the other species. After three days of equilibration time, the concentration of the dimer is the lowest compared to the monomeric vanadium species. The concentration of vanadium in terms of the relative uptake λ = n(V)/n(SO3
) are as follows: V(II) [λ = 0.155] > V(III) [λ = 0.137] > V(IV) [λ = 0.124] > V(V) [λ = 0.053] > Vdimer(IV–V) [λ = 0.039]. The results show that the Vdimer(IV–V) dimer Needs to be considered in addition to the other monomeric species to properly describe the transport of vanadium through Nafion™ in VRFBs.
KW - MicroXRF
KW - VRFB
KW - PVDF-based membrane
KW - UV/VIS
KW - XANES
KW - TXRF
KW - ICP-OES
PY - 2021
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-530676
DO - https://doi.org/10.3390/membranes11080576
VL - 11
IS - 8
SP - 576
PB - MDPI
AN - OPUS4-53067
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Grengg, C.
A1 - Koraimann, G.
A1 - Ukrainczyk, N.
A1 - Rudic, O.
A1 - Luschnig, S.
A1 - Gluth, Gregor
A1 - Radtke, Martin
A1 - Dietzel, M.
A1 - Mittermayr, F.
T1 - Cu- and Zn-doped alkali activated mortar – Properties and durability in (bio)chemically aggressive wastewater environments
N2 - Metakaolin-based alkali activated mortars (AAM) - with and without CuSO4·5H2O and ZnO addition (mass ratio Mn+/solid binder 0.08% to 1.7%) - were casted and exposed within an extensive long-term field campaign over the period of 20 months to a sewer basin, strongly affected by biogenic acid corrosion. (Un-)exposed AAM were tested regarding their physicochemical and microstructural properties, bioreceptivity and overall durability. Metal addition led to a retarding effect during alkali-activation reaction, as well as to an increase in open porosity of up to 3.0% and corresponding lower compressive strength of up to 10.9%. Reduced microbial colonization and diversity were observed on AAM with Cu, while Zn addition led to increased biodiversity. We propose that the observed higher durability of Cu-doped AAM is due to antibacterial effects and associated reduction of biogenic acid production, superseding overall negative effects of metal-dosage on physical material properties. Observed lower durability of Zn-doped AAM was related to combined negative physicochemical and microbial effects.
KW - Microbially induced corrosion
KW - Alkali-activated materials
KW - Biogenic acid corrosion
KW - Biogene Schwefelsäurekorrosion
KW - MIC
PY - 2021
DO - https://doi.org/10.1016/j.cemconres.2021.106541
SN - 0008-8846
VL - 149
SP - 1
EP - 15
PB - Elsevier
CY - Oxford
AN - OPUS4-53070
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Kulow, Anicó
A1 - Witte, S.
A1 - Beyer, S.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Riesemeier, H.
A1 - Streli, C.
T1 - A new experimental setup for time- and laterally-resolved X-ray absorption fine structure spectroscopy in a 'single shot'
N2 - In this work, a new setup for dispersive XAFS measurements is presented. This reproducible and scanningfree setup yields both time- and laterally-resolved XAFS experiments in a ‘single-shot’. It allows a straightforward adjustment for probing different elements covering many relevant applications in materials science. An incoming energetic broadband beam is diffracted by a Si (111) crystal after passing through the sample and collected by an area sensitive detector. Depending on the energy range of the incoming beam, XANES and/or EXAFS spectra can be recorded with a time resolution down to 1 s. The feasibility of this setup was demonstrated at the BAMline at BESSY II (Berlin, Germany) with reference Fe and Cu foils and the results are hereby presented and discussed. Additionally, an application where time resolution on the second scale is required is briefly evaluated. The presented example concerns studying early stages of zinc(II)2-methylimidazolate (ZIF-8) crystallization. This is particularly important for biomedical applications.
KW - X-ray spectroscopy
KW - X-ray absorption fine structure
KW - Time-resolved
KW - Laterally-resolved
KW - Experimental setup
PY - 2019
DO - https://doi.org/10.1039/c8ja00313k
SN - 0267-9477
SN - 1364-5544
VL - 34
IS - 1
SP - 239
EP - 246
PB - Royal Society of Chemistry
CY - London
AN - OPUS4-47207
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - The colour X-ray camera – Basics and applications of a 2D X-ray detector
N2 - The Color X-ray Camera CXC or SLcam® is an energy-resolving X-ray camera capable of energy- and space-resolved measurements. It consists of a high-speed CCD detector coupled to a polycapil-lary optic that conducts the X-ray photons from the probe to distinct pixels onto the detector. The camera is capable of fast acquisition of spatially and energy resolved fluorescence images. A dedicated software enables the acquisition and the online processing of the spectral data for all 69696 pixels, leading to a real-time visualization of the elements distribution in a sample. It was developed in a joint project with BAM, IFG Berlin and PN Sensors. In this contribution we will mainly discuss the use of the CXC at our beamline, the BAMline at BESSY II and imaging applications of the CXC from different areas, like biology and archaeometry. Additionally new developments for the use of the detector without optics, like wavelength dispersive detection or 1shot-XANES, will be presented.
T2 - Seminar Strahlenphysikalische Anwendungen in Technik und Medizin
CY - ATi Wien, Austria
DA - 24.01.2018
KW - XRF
KW - Synchrotron
KW - BAMline
PY - 2018
AN - OPUS4-46365
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Tragbare RFA an Gläsern: Ergebnisse und Grenzen
N2 - Vorstellung der Ergebnisse der Messungen an Gläsern von Goethes Prismen.
T2 - 3. Goethe/Ritter-Workshop
CY - Berlin, Germany
DA - 25.05.2018
KW - Goethe
KW - Farbenlehre
KW - Prisma
KW - Handheld
KW - XRF
PY - 2018
AN - OPUS4-46369
LA - deu
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Iro, M.
A1 - Ingerle, D.
A1 - Radtke, Martin
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Kregsamer, P.
A1 - Streli, C.
T1 - Investigation of polycapillary half lenses for quantitative confocal micro-X-ray fluorescence analysis
N2 - The use of polycapillary optics in confocal micro-X-ray fluorescence analysis (CMXRF) enables the destruction-free 3D investigation of the elemental composition of samples. The energy-dependent transmission properties, concerning intensity and spatial beam propagation of three polycapillary half lenses, which are vital for the quantitative interpretation of such CMXRF measurements, are investigated in a monochromatic confocal laboratory setup at the Atominstitut of TU Wien, and a synchrotron setup on the BAMline beamline at the BESSY II Synchrotron, Helmholtz-Zentrum-Berlin. The empirically established results, concerning the intensity of the transmitted beam, are compared with theoretical values calculated with the polycap software package and a newly presented analytical model for the transmission function.
The resulting form of the newly modelled energy-dependent transmission function is shown to be in good agreement with Monte Carlo simulated results for the complete energy regime, as well as the empirically established results for the energy regime between 6 keV and 20 keV. An analysis of possible fabrication errors was conducted via pinhole scans showing only minor fabrication errors in two of the investigated polycapillary optics. The energy-dependent focal spot size of the primary polycapillary was investigated in the laboratory via the channel-wise evaluation of knife-edge scans. Experimental results are compared with data given by the manufacturer as well as geometric estimations for the minimal focal spot size. Again, the resulting measurement points show a trend in agreement with geometrically estimated results and manufacturer data.
KW - BAMline
KW - Synchrotron
KW - Capillary
KW - confocal
PY - 2022
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-562430
DO - https://doi.org/10.1107/S1600577522009699
SN - 1600-5775
VL - 29
SP - 1376
EP - 1384
PB - International Union of Crystallography
CY - Chester
AN - OPUS4-56243
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - de O. Primo, J.
A1 - Horsth, D.F.
A1 - de S. Correa, J.
A1 - Das, A.
A1 - Bittencourt, C.
A1 - Umek, P.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Yusenko, Kirill
A1 - Zanetta, C.
A1 - Anaissi, F.J.
T1 - Synthesis and Characterization of Ag/ZnO Nanoparticles for Bacteria Disinfection in Water
N2 - n this study, two green synthesis routes were used for the synthesis of Ag/ZnO nanoparticles, using cassava starch as a simple and low-cost effective fuel and Aloe vera as a reducing and stabilizing agent. The Ag/ZnO nanoparticles were characterized and used for bacterial dis-
infection of lake water contaminated with Escherichia coli (E. coli). Characterization indicated the formation of a face-centered cubic structure of metallic silver nanoparticles with no insertion of Ag into the ZnO hexagonal wurtzite structure. Physicochemical and bacteriological analyses described in “Standard Methods for the Examination of Water and Wastewater” were used to evaluate the efficiency of the treatment. In comparison to pure ZnO, the synthesized Ag/ZnO nanoparticles showed high efficiencies against Escherichia coli (E. coli) and general coliforms present in the lake
water. These pathogens were absent after treatment using Ag/ZnO nanoparticles. The results indicate that Ag/ZnO nanoparticles synthesized via green chemistry are a promising candidate for the treatment of wastewaters contaminated by bacteria, due to their facile preparation, low-cost synthesis,and disinfection efficiency.
KW - Synchrotron
KW - BAMline
PY - 2022
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-562440
DO - https://doi.org/10.3390/nano12101764
SN - 2079-4991
VL - 12
IS - 10
SP - 1
EP - 18
PB - MDPI
CY - Basel
AN - OPUS4-56244
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Big to Small - Getting Smarter@BAMline
N2 - In this talk an overview about artificial intelligence/machine learning applications @BAMline is given. In the first part, the use of neural networks for the quantification of XRF measurements and the decoding of coded-aperture measurements are shown. Then it is shown how Gaussian processes and Bayesian statistics can be used to achieve an optimal alignment of the set-up and in general for optimization of measurements.
T2 - Forschungsseminar Institut für Optik und Atomare Physik TU Berlin
CY - Berlin, Germany
DA - 25.10.2022
KW - Artificial Inelligence
KW - Machine Learning
KW - Bayesian Statistics
KW - Gaussian process
KW - Neural network
KW - BAMline
KW - Synchrotron
PY - 2022
AN - OPUS4-56249
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Getting more efficient – The use of Bayesian optimization and Gaussian processes at the BAMline
N2 - For more than 20 years, BAM is operating the BAMline at the synchrotron BESSY II in Berlin Adlershof. During this time, the complexity of the setup and the amount of data generated have multiplied. To increase the effectiveness and in preparation for BESSY III, algorithms from the field of machine learning are increasingly used.
In this paper, several examples in the areas of beamline alignment and measurement time optimization based on Bayesian optimization (BO) with Gaussian processes (GP) are presented. BO is a method for finding the global optimum of a function using a probabilistic model represented by a GP. The advantage of this method is that it can handle high-dimensional problems, does not depend on the initial estimate, and also provides uncertainty estimates.
After a short introduction to BO and GP, the first example is the automatic alignment of our double multilayer monochromator (DMM). To achieve optimal performance, up to three linear and two angular motor positions have to be optimized. To achieve this with a grid scan, at least 100^5 measurement points would be required. Assuming that all positions can be aligned independently, 100*5 points are still necessary. We show that with BO and GP less than 100 points are sufficient to achieve equal or better results.
The second example is the optimization of measurement time in XRF scanning. Here we will show the advantage of the BO GP approach over point-by-point scanning. As can be seen in Fig. 1, the number of points required and thus the measurement time can be reduced by a factor of 50, while the loss in image quality is acceptable. The advantages and limitations of this approach will be discussed.
T2 - European Conference on X-ray Spectrometry 2022
CY - Bruges, Belgium
DA - 26.06.2022
KW - Artificial Inelligence
KW - Machine Learning
KW - Bayesian Statistics
KW - Gaussian process
KW - Neural network
KW - BAMline
KW - Synchrotron
PY - 2022
AN - OPUS4-56251
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - From Egypt to Hiddensee – Analysis of Gold with Synchrotron Radiation IV
N2 - Gold is one of the seven metals already known in antiquity and was used from time immemorial as a medium of exchange and for the production of jewelry because of its luster and rarity. In addition, it is easy to work and largely resistant to chemical influences. Investigations of gold using synchrotron radiation excited X-ray fluorescence analysis are non-destructive and provide information about the chemical elements present in the sample under investigation. The investigations presented here at BAMline focus on questions such as the origin, manufacturing process, and association of gold findings. The different questions are explained by a number of examples ranging from the Viking treasure from Hiddensee to the Nebra Sky Disk and finds from Egypt. The find from Bernstorf is discussed in detail. A Bayesian treatment of the authenticity is shown.
T2 - Ringvorlesung Einführung in die Archäometrie
CY - Berlin, Germany
DA - 04.11.2022
KW - Synchrotron
KW - BAMline
KW - Bayesian Statistics
KW - Gold
KW - Röntgenfluoreszenz
PY - 2022
AN - OPUS4-56252
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Energy Resolved Imaging with Coded Apertures
N2 - Our aim is to develop a simple and inexpensive method for full field X-ray fluorescence imaging.We combine an energydispersive array detector with a coded aperture to obtain high resolut ion images. To obtain the information from the recorded image a reconstruction step is necessary. The reconstruction methods we have developed, were tested on simulated data and then applied to experimental data. The first tests were carried out at the BAMline @BESSY II. This method enables the simultaneous detection of multiple elements,which is important e.g. in the field of catalysis.
T2 - SRI 2021
CY - Online meeting
DA - 28.3.2022
KW - Synchrotron
KW - BAMline
KW - Machine Learning
KW - Coded Aperture
PY - 2022
AN - OPUS4-56298
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - News from the BAMline
N2 - A presentation of recent measurements at the BAMline with focus on AI and ML applications
T2 - Seminar: Strahlenphysikalische Anwendungen in Technik und Medizin
CY - Vienna, Austria
DA - 18.05.2022
KW - Synchrotron
KW - BAMline
KW - Bayesian Statistics
KW - Gold
KW - X-ray fluorescence
PY - 2022
AN - OPUS4-56253
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Getting more efficient – The use of Bayesian optimization and Gaussian processes at the BAMline
N2 - For more than 20 years, BAM is operating the BAMline at the synchrotron BESSY II in Berlin Adlershof. During this time, the complexity of the setup and the amount of data generated have multiplied. To increase the effectiveness and in preparation for BESSY III, algorithms from the field of machine learning are increasingly used.
After a short introduction to BO and GP, the first example is the automatic alignment of our double multilayer monochromator (DMM).
The second example is the optimization of measurement time in XRF scanning.
T2 - SNI2022 conference
CY - Berlin, Germany
DA - 05.09.2022
KW - Artificial Inelligence
KW - Machine Learning
KW - Bayesian Statistics
KW - Gaussian process
KW - X-ray fluorescence
KW - BAMline
PY - 2022
AN - OPUS4-56255
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Kulow, Anicó
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Reinholz, Uwe
A1 - Emmerling, Franziska
A1 - Hampel, S.
A1 - Fittschen, UEA
A1 - Streli, C.
A1 - Radtke, Martin
T1 - Reconstruction for coded aperture full-field x-ray fluorescence imaging
N2 - X-ray fluorescence imaging is a well-established tool in materials characterization. In this work, we present the adaption of coded aperture imaging to full-field X-ray fluorescence imaging at the synchrotron. Coded aperture imaging has its origins in astrophysics, and has several advantages: Coded apertures are relatively easy to fabricate, achromatic, allow a high photon throughput, and high angular acceptance. Coded aperture imaging is a two-step-process, consisting of the measurement process and a reconstruction step. Different programs have been written, for the raytracing/forward projection and the reconstruction. Experiments with coded aperture in combination with a Color X-ray Camera and an energy-dispersive area detector, have been conducted at the BAMline. Measured samples were successfully reconstructed, and gave a 9.1-fold increase in count rate compared to a polycapillary optic.
KW - Synchrotron
KW - BAMline
KW - Coded Aperture
PY - 2022
SN - 1097-0002
VL - 65
SP - 57
EP - 70
PB - Cambridge University Press
CY - Cambridge
AN - OPUS4-56350
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Lilensten, L.
A1 - Provost, K.
A1 - Perrière, L.
A1 - Fonda, E.
A1 - Couzinié, J.
A1 - Amman, F.
A1 - Radtke, Martin
A1 - Dirras, G.
A1 - Guillot, I.
T1 - Experimental investigation of the local environment and lattice distortion in refractory medium entropy alloys
N2 - EXAFS analysis of pure elements, binary and ternary equiatomic refractory alloys within the Nb-Zr-Ti-Hf- Ta system is performed at the Nb and Zr K-edges to analyze the evolution of the chemical local environ- ment and the lattice distortion. A good mixing of the elements is found at the atomic scale. For some compounds, a distribution of distances between the central atom and its neighbors suggests a distortion of the structure. Finally, analysis of the Debye-Waller parameters shows some correlation with the lat- tice distortion parameter δ², and allows to quantify experimentally the static disorder in medium entropy alloys.
KW - BAMline
KW - Refractory alloys
KW - EXAFS
KW - Debye-Waller parameter
PY - 2022
DO - https://doi.org/10.1016/j.scriptamat.2022.114532
SN - 1359-6462
VL - 211
SP - 1
EP - 6
PB - Elsevier Ltd.
AN - OPUS4-55287
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Margreiter, R.
A1 - Baumann, J.
A1 - Mantouvalou, I.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Strub, E.
T1 - Investigations on fire-gilding
N2 - Fire-gilding is a historic technique for the application of golden layers on a number of different base materials utilizing a gold amalgam. This technique leaves a significant amount of Hg in the golden layer, giving archeometrists a reliable indicator to identify firegildings.
Recent findings on presumably fire-gilded objects have shown in several cases significantly lower Hg content than previously studied objects. This prompted a synchrotron-based X-ray fluorescence investigation into the Hg distribution along the material–gilding interface, as well as a series of measurements regarding the Hg content development in fire-gilded samples during artificial aging. This work presents findings on laboratory-prepared fire-gildings, indicating an Hg enrichment at the interface of firegilded silver samples. Notably, such an enrichment is missing in fire-gilded copper samples. Further, it is confirmed that fire-gilded layers typically do not undercut an Hg bulk content of 5%. In this light, it seems improbable that ancient samples that contain <5% Hg are fire-gilded. The results presented in this study might lead to a non-destructive method to identify the Hg enrichment at the interface. This might be obtained by a combination of different non-destructive measurements and might also work unambiguously in samples in which the gold top layer is altered.
KW - BAMline
KW - X-Ray Fluorescence
KW - Gilding
KW - Depth profile
KW - Archaeometry
PY - 2022
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-552885
DO - https://doi.org/10.1111/arcm.12797
SN - 0003-813X
SP - 1
EP - 14
PB - Wiley online library
AN - OPUS4-55288
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - C. Pardo Pérez, L.
A1 - Arndt, A.
A1 - Stojkovikj, S.
A1 - Y. Ahmet, I.
A1 - T. Arens,, J.
A1 - Dattila, F.
A1 - Wendt, R.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Davies, V.
A1 - Höflich, K.
A1 - Köhnen, E.
A1 - Tockhorn, P.
A1 - Golnak, R.
A1 - Xiao, J.
A1 - Schuck, G.
A1 - Wollgarten, M.
A1 - López, N.
A1 - T. Mayer, M.
T1 - Determining Structure-Activity Relationships in Oxide Derived CuSn Catalysts During CO2 Electroreduction Using X-Ray Spectroscopy
N2 - The development of earth-abundant catalysts for selective electrochemical CO2 conversion is a central challenge. Cu-Sn bimetallic catalysts can yield selective CO2 reduction toward either CO or formate. This study presents oxide-derived Cu-Sn catalysts tunable for either product and seeks to understand the synergetic effects between Cu and Sn causing these selectivity trends. The materials undergo significant transformations under CO2 reduction conditions, and their dynamic bulk and surface structures are revealed by correlating observations from multiple methods—X-ray absorption spectroscopy for in situ study, and quasi in situ X-ray photoelectron spectroscopy for surface sensitivity. For both types of catalysts, Cu transforms to metallic Cu0 under reaction conditions. However, the Sn speciation and content differ significantly between the catalyst types: the CO-selective catalysts exhibit a surface Sn content of 13 at. % predominantly present as oxidized Sn, while the formate-selective catalysts display an Sn content of ≈70 at. % consisting of both metallic Sn0 and Sn oxide species. Density functional theory simulations suggest that Snδ+ sites weaken CO adsorption, thereby enhancing CO selectivity, while Sn0 sites hinder H adsorption and promote formate production. This study reveals the complex dependence of catalyst structure, composition, and speciation with electrochemical bias in bimetallic Cu catalysts.
KW - Electrochemical CO2 conversion
KW - Cu catalysts
KW - X-ray absorption spectroscopy
PY - 2022
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-547116
DO - https://doi.org/10.1002/aenm.202103328
SN - 1614-6832
VL - 12
IS - 5
SP - 2103328
PB - Wiley-VCH GmbH
AN - OPUS4-54711
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Cakir, Cafer Tufan
A1 - Radtke, Martin
A1 - Haider, M. Bilal
A1 - Emmerling, Franziska
A1 - F. M. Oliveira, P.
A1 - Michalchuk, Adam A. L.
T1 - Dispersive x-ray absorption spectroscopy for time-resolved in situ monitoring of mechanochemical reactions
N2 - X-ray absorption spectroscopy (XAS) provides a unique, atom-specific tool to probe the electronic structure of solids. By surmounting long-held limitations of powder-based XAS using a dynamically averaged powder in a Resonant Acoustic Mixer (RAM), we demonstrate how time-resolved in situ (TRIS) XAS provides unprecedented detail of mechanochemical synthesis. The use of a custom-designed dispersive XAS (DXAS) setup allows us to increase the time resolution over existing fluorescence measurements from ∼15 min to 2 s for a complete absorption spectrum. Hence, we here establish TRIS-XAS as a viable method for studying mechanochemical reactions and sampling reaction kinetics. The generality of our approach is demonstrated through RAM-induced (i) bottom-up Au nanoparticle mechanosynthesis and (ii) the synthesis of a prototypical metal organic framework, ZIF-8. Moreover, we demonstrate that our approach also works with the addition of a stainless steel milling ball, opening the door to using TRIS-DXAS for following conventional ball milling reactions. We expect that our TRIS-DXAS approach will become an essential part of the mechanochemical tool box.
KW - In situ studies
KW - Dipsersive XAS
KW - Mechanochemistry
KW - Time-resolved
PY - 2022
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-567659
DO - https://doi.org/10.1063/5.0130673
SN - 1089-7690
VL - 157
IS - 21
SP - 1
EP - 12
PB - American Institute of Physics
CY - Melville, NY
AN - OPUS4-56765
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Guerra, M.F.
A1 - Neri, E.
A1 - Radtke, Martin
T1 - Gold leaf tesserae: tracing the origins of gold using synchrotron-based techniques
N2 - To gain insight into the possible origin of the gold used in the production of tesserae containing gold leaf less than 0.5 μm thick placed between two layers of glass, we propose a non-destructive synchrotron radiation (SR) XRF protocol based on sequential analysis under optimised analytical conditions. Using this protocol, trace element analysis is achieved with detection limits of 1–6 mg/kg. As Pt and Au have adjacent fluorescence energies, we tested the most challenging situation, when Pt is present in very low concentrations in gold. Data obtained by double-dispersive XRF (D2XRF) and μXRF for fourth–ninth-century mosaics decorating nine Eastern and Western religious buildings show that the Eastern and Western tesserae are made from different alloys.
However, these alloys are identical to those used to make gold leaf for gilding, because plastic deformation requires the use of gold alloys with high ductility and malleability. Although trace element composition of gold used in the concerned period is only available for coins, by comparing the amounts of Pt contained in the tesserae and in the coins we show that Roman tesserae are made from Roman gold, as described in the documentary sources. We observe for the Byzantine period the use of a Byzantine gold and of gold supposedly from different stages of recycling, and we suggest the use of Umayyad and Abbasid gold for the production of Islamic tesserae.
KW - Gold
KW - XRF
KW - Synchrotron
KW - BAMline
KW - D2XRF
KW - Tesserae
PY - 2023
DO - https://doi.org/10.1140/epjp/s13360-022-03638-y
SN - 2190-5444
VL - 138
IS - 2
SP - 1
EP - 15
AN - OPUS4-57208
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Förste, F.
A1 - Bauer, L.
A1 - Streeck, C.
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Kadow, D.
A1 - Keil, C.
A1 - Mantouvalou, I.
T1 - Quantitative Analysis and 2D/3D Elemental Imaging of Cocoa Beans Using X‑ray Fluorescence Techniques
N2 - As an important raw material for the confectionery industry, the cocoa bean (Theobroma cacao L.) has to meet certain legal requirements in terms of food safety and maximum contaminant levels in order to enter the cocoa market. Understanding the enrichment and distribution of essential minerals but also toxic metals is of utmost importance for improving the nutritional quality of this economically important raw food material. We present three X-ray fluorescence (XRF) techniques for elemental bio-imaging of intact cocoa beans and one additional XRF technique for quantitative analysis of cocoa pellets. The interrelation of all the methods presented gives a detailed picture of the content and 3D-resolved distribution of elements in complete cocoa beans for the first time.
KW - BAMline
KW - Synchrotron
KW - XRF
KW - CXC
KW - Cocoa
PY - 2023
DO - https://doi.org/10.1021/acs.analchem.2c05370
VL - 95
SP - 5627
EP - 5635
PB - ACS Publications
AN - OPUS4-57832
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Cakir, Cafer Tufan
A1 - Piotrowiak, T.
A1 - Reinholz, Uwe
A1 - Ludwig, A.
A1 - Emmerling, Franziska
A1 - Streli, C.
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
T1 - Exploring the Depths of Corrosion: A Novel GE-XANES Technique for Investigating Compositionally Complex Alloys
N2 - In this study, we propose the use of nondestructive, depth-resolved, element-specific characterization using grazing exit X-ray absorption near-edge structure spectroscopy (GE-XANES) to investigate the corrosion process in compositionally complex alloys (CCAs). By combining grazing exit X-ray fluorescence spectroscopy (GE-XRF) geometry and a pnCCD detector, we provide a scanning-free, nondestructive, depth-resolved analysis in a sub-micrometer depth range, which is especially relevant for layered materials, such as corroded CCAs. Our setup allows for spatial and energy-resolved measurements and directly extracts the desired fluorescence line, free from scattering events and other overlapping lines. We demonstrate the potential of our approach on a compositionally complex CrCoNi alloy and a layered reference sample with known composition and specific layer thickness. Our findings indicate that this new GE-XANES approach has exciting opportunities for studying surface catalysis and corrosion processes in real-world materials.
KW - Degradation mechanisms
KW - Grazin exit XANES
KW - Depth resolved XANES
KW - Compositional complex alloys
KW - Corrosion
PY - 2023
DO - https://doi.org/10.1021/acs.analchem.3c00404
VL - 95
SP - 4810
EP - 4818
PB - ACS Publications
AN - OPUS4-57823
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - de Oliveira Guilherme Buzanich, Ana
A1 - Radtke, Martin
A1 - Yusenko, Kirill
A1 - Stawski, Tomasz
A1 - Kulow, Anicó
A1 - Cakir, Cafer Tufan
A1 - Röder, Bettina
A1 - Naese, Christoph
A1 - Britzke, Ralf
A1 - Sintschuk, Michael
A1 - Emmerling, Franziska
T1 - BAMline - A real-life sample materials research beamline
N2 - With increasing demand and environmental concerns, researchers are exploring new materials that can perform as well or better than traditional materials while reducing environmental impact. The BAMline, a real-life sample materials research beamline, provides unique insights into materials’ electronic and chemical structure at different time and length scales. The beamline specializes in x-ray absorption spectroscopy, x-ray fluorescence spectroscopy, and tomography experiments. This enables real-time optimization of material properties and performance for various applications, such as energy transfer, energy storage, catalysis, and corrosion resistance. This paper gives an overview of the analytical methods and sample environments of the BAMline, which cover non-destructive testing experiments in materials science, chemistry, biology, medicine, and cultural heritage. We also present our own synthesis methods, processes, and equipment developed specifically for the BAMline, and we give examples of synthesized materials and their potential applications. Finally, this article discusses the future perspectives of the BAMline and its potential for further advances in sustainable materials research.
KW - Extended X-ray absorption fine structure
KW - Energy storage
KW - Environmental impacts
KW - Nondestructive testing techniques
KW - X-ray fluorescence spectroscopy
KW - Corrosion
KW - Near edge X-ray absorption fine structure spectroscopy
KW - X-ray absorption spectroscopy
PY - 2023
DO - https://doi.org/10.1063/5.0157194
VL - 158
IS - 24
SP - 1
EP - 22
PB - AIP Publishing
AN - OPUS4-57824
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Peters, Stefan
A1 - Kunkel, Benny
A1 - Cakir, Cafer Tufan
A1 - Kabelitz, Anke
A1 - Witte, Steffen
A1 - Bernstein, Thomas
A1 - Bartling, Stephan
A1 - Radtke, Martin
A1 - Emmerling, Franziska
A1 - Abdel-Mageed, Ali Mohamed
A1 - Wohlrab, Sebastian
A1 - Guilherme Buzanich, Ana
T1 - Time-, space- and energy-resolved in situ characterization of catalysts by X-ray absorption spectroscopy
N2 - A novel setup for dispersive X-ray absorption spectroscopy (XAS) with simultaneous resolution of space, time and energy for in situ characterization of solid materials is demonstrated.
KW - Dispersive XAS
KW - Catalysis
KW - In situ
KW - Structure analysis
PY - 2023
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-584924
DO - https://doi.org/10.1039/d3cc03277a
SN - 1359-7345
SP - 1
EP - 4
PB - Royal Society of Chemistry (RSC)
AN - OPUS4-58492
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CHAP
A1 - Radtke, Martin
A1 - Reinholz, Uwe
A1 - Guerra, M.F.
A1 - Martinón-Torres, M.
A1 - Lemasson, Q.
A1 - Moignard, B.
A1 - Pacheco, C.
A1 - Pichon, L.
A1 - Macdonald, L.
A1 - Hess, M.
A1 - Tissot, I.
ED - Guerra, M. F.
ED - Martinón-Torres, M.
ED - Quirke, S.
T1 - Analytical approaches to Egyptian goldwork
N2 - The structure and composition of ancient gold objects retain information about their long history of manufacture, from the exploitation of the ore to the finishing touches, as well as evidence of their use, deposition, and degradation. By developing an efficient analytical strategy, it is possible to retrieve that information. This chapter sets the necessary foundation 131to explore fully the analytical results presented in the following chapters of this volume. The techniques employed in the analyses of the Egyptian jewellery are described and the analytical parameters provided. For more established techniques, only brief introductions are presented, while more recent developments are presented in greater detail.
KW - Gold
KW - Synchrotron
KW - D2XRF
KW - Egypt
PY - 2023
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-586039
DO - https://doi.org/10.17863/CAM.99681
SP - 131
EP - 191
AN - OPUS4-58603
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Enhancing efficiency at bamline: employing data science and machine learning for x-ray research
N2 - This talk discusses how data science and machine learning techniques are being applied at the BAM Federal Institute for Materials Research and Testing to enhance efficiency and automation at the BAMLine synchrotron facility. The methods presented include Gaussian processes and Bayesian optimization for beamline adjustment and optimization of X-ray measurements. These statistical techniques allow automated alignment of beamline components and active learning scanning to reduce measurement time.
Additional machine learning methods covered are neural networks for quantification of X-ray fluorescence (XRF) data and decoding coded apertures.
T2 - 17th International Work-Conference on Artificial Neural Networks (IWANN2023)
CY - Ponta Delgada, Portugal
DA - 19.06.2023
KW - Bayesian Optimization
KW - Gaussian Process
KW - BAMline
PY - 2023
AN - OPUS4-58605
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - CONF
A1 - Radtke, Martin
T1 - Insights into materials with hard x-rays: capabilities of the bamline
N2 - This contribution provides an overview of the BAMline synchrotron radiation beamline, which specializes in hard X-ray spectroscopy techniques for materials research. The BAMline offers X-ray absorption spectroscopy (XAS), x-ray fluorescence spectroscopy (XRF), and tomography to study materials' electronic structure, chemical composition, and structure. Key capabilities include standard and dispersive XAS for electronic structure, micro-XRF for elemental mapping, coded aperture imaging, and depth-resolved grazing exit XAS. The BAMline enables in situ characterization during materials synthesis and functions for energy, catalysis, corrosion, biology, and cultural heritage applications.
Ongoing developments like the implementation of machine learning techniques for experiment optimization and data analysis will be discussed. For instance, Bayesian optimization is being used to improve beamline alignment and scanning. An outlook to the future, where the BAMline will continue pioneering dynamic and multi-scale characterization, aided by advanced data science methods, to provide unique insights into materials research, will be given.
T2 - μ-XRF at Elettra 2.0: challenges and opportunities
CY - Trieste, Italy
DA - 11.09.2023
KW - Synchrotron
KW - XRF
KW - XANES
KW - Bayes
PY - 2023
AN - OPUS4-58607
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Dobosy, Péter
A1 - Nguyen, Hoang Thi Phuong
A1 - Záray, Gyula
A1 - Streli, Christina
A1 - Ingerle, Dieter
A1 - Ziegler, Philipp
A1 - Radtke, Martin
A1 - Buzanich, Ana Guilherme
A1 - Endrédi, Anett
A1 - Fodor, Ferenc
T1 - Effect of iodine species on biofortification of iodine in cabbage plants cultivated in hydroponic cultures
N2 - Iodine is an essential trace element in the human diet because it is involved in the synthesis of thyroid hormones. Iodine deficiency affects over 2.2 billion people worldwide, making it a significant challenge to find plant-based sources of iodine that meet the recommended daily intake of this trace element. In this study, cabbage plants were cultivated in a hydroponic system containing iodine at concentrations ranging from 0.01 to 1.0 mg/L in the form of potassium iodide or potassium iodate. During the experiments, plant physiological parameters, biomass production, and concentration changes of iodine and selected microelements in different plant parts were investigated. In addition, the oxidation state of the accumulated iodine in root samples was determined. Results showed that iodine addition had no effect on photosynthetic efficiency and chlorophyll content. Iodide treatment did not considerably stimulate biomass production but iodate treatment increased it at concentrations less than 0.5 mg/L. Increasing iodine concentrations in the nutrient solutions increased iodine content in all plant parts; however, the iodide treatment was 2–7 times more efficient than the iodate treatment. It was concluded, that iodide addition was more favourable on the target element accumulation, however, it should be highlighted that application of this chemical form in nutrient solution decreased the concetrations of selected micoelement concentration comparing with the control plants. It was established that iodate was reduced to iodide during its uptake in cabbage roots, which means that independently from the oxidation number of iodine (+ 5, − 1) applied in the nutrient solutions, the reduced form of target element was transported to the aerial and edible tissues.
KW - BAMline
KW - XANES
KW - Synchrotron
KW - Lodine
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-608330
DO - https://doi.org/10.1038/s41598-024-66575-z
VL - 14
IS - 1
SP - 1
EP - 12
PB - Springer Science and Business Media LLC
AN - OPUS4-60833
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Huang, Junhao
A1 - Klahn, Marcus
A1 - Tian, Xinxin
A1 - Bartling, Stephan
A1 - Zimina, Anna
A1 - Radtke, Martin
A1 - Rockstroh, Nils
A1 - Naliwajko, Pawel
A1 - Steinfeldt, Norbert
A1 - Peppel, Tim
A1 - Grunwaldt, Jan‐Dierk
A1 - Logsdail, Andrew J.
A1 - Jiao, Haijun
A1 - Strunk, Jennifer
T1 - Fundamental Structural and Electronic Understanding of Palladium Catalysts on Nitride and Oxide Supports
N2 - The nature of the support can fundamentally affect the function of a heterogeneous catalyst. For the novel type of isolated metal atom catalysts, sometimes referred to as single‐atom catalysts, systematic correlations are still rare. Here, we report a general finding that Pd on nitride supports (non‐metal and metal nitride) features a higher oxidation state compared to that on oxide supports (non‐metal and metal oxide). Through thorough oxidation state investigations by X‐ray absorption spectroscopy (XAS), X‐ray photoelectron spectroscopy (XPS), CO‐DRIFTS, and density functional theory (DFT) coupled with Bader charge analysis, it is found that Pd atoms prefer to interact with surface hydroxyl group to form a Pd(OH)x species on oxide supports, while on nitride supports, Pd atoms incorporate into the surface structure in the form of Pd−N bonds. Moreover, a correlation was built between the formal oxidation state and computational Bader charge, based on the periodic trend in electronegativity.
KW - BAmline
KW - XANES
KW - Catalyst
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-608341
DO - https://doi.org/10.1002/anie.202400174
SN - 1433-7851
VL - 63
IS - 20
SP - 1
EP - 9
PB - Wiley
AN - OPUS4-60834
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Valentim Gelamo, Rogério
A1 - Bueno Leite, Natália
A1 - Amadeu, Nader
A1 - Reis Pedreira Muniz Tavares, Michel
A1 - Oberschmidt, Dirk
A1 - Klemm, Sophie
A1 - Fleck, Claudia
A1 - Cakir, Cafer-Tufan
A1 - Radtke, Martin
A1 - Aparecido Moreto, Jéferson
T1 - Exploring the Nb2O5 coating deposited on the Ti-6Al-4V alloy by a novel GE-XANES technique and nanoindentation load-depth
N2 - This research group has been demonstrating the significant advantages of using Nb2O5 coatings for functionalizing titanium, aluminium, and stainless steels. Regarding the biomedical sector and considering Ti-6Al-4V alloy, the reactive sputtering technique improved the cell viability, the osteogenic performance of cells involved in the osseointegration process as well as the ability to delay bacterial proliferation. The characteristics of the Nb2O5 coatings were assessed before by using standard methods, which provide information only a few tens of nanometers depth. Given that the Nb2O5 coating fabricated in this work exhibits a thickness of approximately 300 nm, the GE-XANES technique emerges as the most suitable method for this analysis. Additional information was provided with the aid of nanoindentation load-depth (P-h) curves. GE-XANES results indicated the formation of a homogeneous layer of Nb2O5 coating on the Ti-6Al-4V surfaces. The deposition process improved the surface hardness of the Ti-6Al-4V alloy (4.38 GPa versus 5.62 GPa) considering the 2 mN load.
KW - BAMline
KW - GE-XANES
KW - Synchrotron
PY - 2024
DO - https://doi.org/10.1016/j.matlet.2023.135584
SN - 0167-577X
VL - 355
SP - 1
EP - 4
PB - Elsevier B.V.
AN - OPUS4-60835
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Senges, Gene
A1 - Buzanich, Ana Guilherme
A1 - Lindič, Tilen
A1 - Gully, Tyler A.
A1 - Winter, Marlon
A1 - Radtke, Martin
A1 - Röder, Bettina
A1 - Steinhauer, Simon
A1 - Paulus, Beate
A1 - Emmerling, Franziska
A1 - Riedel, Sebastian
T1 - Unravelling highly oxidized nickel centers in the anodic black film formed during the Simons process by in situ X-ray absorption near edge structure spectroscopy
N2 - The electrofluorination after Simons has been used for the last century to produce everyday life materials. An in situ XANES investigation of the controversially debated black film apparent in the Simons process revealed high-valent nickel centers.
KW - Synchrotron
KW - BAMline
KW - XANES
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-608366
DO - https://doi.org/10.1039/d3sc06081k
SN - 2041-6520
VL - 15
IS - 12
SP - 4504
EP - 4509
PB - Royal Society of Chemistry (RSC)
AN - OPUS4-60836
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -
TY - JOUR
A1 - Cakir, Cafer Tufan
A1 - Bogoclu, Can
A1 - Emmerling, Franziska
A1 - Streli, Christina
A1 - Guilherme Buzanich, Ana
A1 - Radtke, Martin
T1 - Machine learning for efficient grazing-exit x-ray absorption near edge structure spectroscopy analysis: Bayesian optimization approach
N2 - In materials science, traditional techniques for analyzing layered structures are essential for obtaining information about local structure, electronic properties and chemical states. While valuable, these methods often require high vacuum environments and have limited depth profiling capabilities. The grazing exit x-ray absorption near-edge structure (GE-XANES) technique addresses these limitations by providing depth-resolved insight at ambient conditions, facilitating in situ material analysis without special sample preparation. However, GE-XANES is limited by long data acquisition times, which hinders its practicality for various applications. To overcome this, we have incorporated Bayesian optimization (BO) into the GE-XANES data acquisition process. This innovative approach potentially reduces measurement time by a factor of 50. We have used a standard GE-XANES experiment, which serve as reference, to validate the effectiveness and accuracy of the BO-informed experimental setup. Our results show that this optimized approach maintains data quality while significantly improving efficiency, making GE-XANES more accessible to a wider range of materials science applications.
KW - Machine Learning
KW - GE-XANES
KW - Bayesian Optimization
PY - 2024
UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-603955
DO - https://doi.org/10.1088/2632-2153/ad4253
VL - 5
IS - 2
SP - 1
EP - 12
PB - IOP Publishing
AN - OPUS4-60395
LA - eng
AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER -