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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 - CONF A1 - Reinholz, Uwe T1 - A novel device for elemental distribution imaging: the color x-ray camera T2 - Third Joint BER II and BESSY II Users´ Meeting CY - Berlin, Germany DA - 2011-11-30 PY - 2011 AN - OPUS4-25123 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reinholz, Uwe T1 - Homogeneity testing of natural candidate reference materials for resource technology by three spatially-resolved X-ray methods T2 - ANAKON CY - Essen, Germany DA - 2013-03-04 PY - 2013 AN - OPUS4-27868 LA - deu 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 - 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 - 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 - CONF A1 - Reinholz, Uwe T1 - Archäometrie an der BAMline T2 - Lange Nacht der Wissenschaften, BAM, BESSY II CY - Berlin, Germany DA - 2010-06-05 PY - 2010 AN - OPUS4-21379 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reinholz, Uwe T1 - Facettenreiche Forschung an der BAMline T2 - Lange Nacht der Wissenschaften 2012 CY - Berlin, Germany DA - 2012-06-02 PY - 2012 AN - OPUS4-25943 LA - deu 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 - CONF A1 - Reinholz, Uwe T1 - SHADING EFFECTS IN SR-TXRF: CALCULATIONS AND EXPERIMENTAL VISUALIZSATION USING A COLOR X-RAY CAMERA T2 - European Conference on X-Ray Spectrometry EXRS CY - Bologna (Italien) DA - 2014-06-15 PY - 2014 AN - OPUS4-32398 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reinholz, Uwe T1 - THE IDEAL SPECIMENT FOR TOTAL REFLECTION X-RAY FLUORESCENCE (TKRF) ANALYSIS:RESULTS FROM SIMULATIONS AMD EXPERIMENTAL EVALUATION T2 - Denver X-Ray Conference CY - Westminster, Colorado, USA DA - 2013-08-05 PY - 2013 AN - OPUS4-32504 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reinholz, Uwe T1 - Gold in Ancient Egypt: studies on provenance & corrosion T2 - Synchrotron Radiation in Art and Archaeology SR2A CY - Paris DA - 2014-09-10 PY - 2014 AN - OPUS4-32400 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Reinholz, Uwe T1 - Evaluation of Total Reflection X-ray Fluorescence (TXRF) Analysis Using a Color X-ray Camera T2 - Fifth Join BER II and BESSY II Users Meeting CY - Berlin, Germany DA - 2013-12-04 PY - 2013 AN - OPUS4-29833 LA - deu 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 96–98), 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 - Reinholz, Uwe T1 - The Colour X-ray Camera: Basics, Applications and Perspectives T2 - 11th International Conference on Synchrotron Radiation Instrumentation CY - Lyon, France DA - 2012-07-09 PY - 2012 AN - OPUS4-27184 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 - Reinholz, Uwe A1 - Munnik, F. T1 - Spatially-resolved analysis of natural minerals as carriers of high-tech metals and Rare Earth Elements: comparison of EPMA, PIXE and Sy-µXRF T2 - 13th INTERNATIONAL CONFERENCE ON NUCLEAR MICROPROBE TECHNOLOGY & APPLICATIONS 2012 CY - Lisbon, Portugal DA - 2012-07-22 PY - 2012 AN - OPUS4-26962 LA - deu 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 - Reinholz, Uwe T1 - Absorption of the Primary Beam in SR-TXRF Analysis: Experimental Visualisation Using a Color X-ray Camera (CXC) T2 - Fifth Joint BER II and Bessy II Users Meeting CY - Berlin, Germany DA - 2013-12-04 PY - 2013 AN - OPUS4-29835 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 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 - JOUR A1 - Heilmann, Maria A1 - Kulla, Hannes A1 - Prinz, Carsten A1 - Bienert, Ralf A1 - Reinholz, Uwe A1 - de Oliveira Guilherme Buzanich, Ana A1 - Emmerling, Franziska T1 - Advances in Nickel Nanoparticle Synthesis via Oleylamine Route N2 - Nickel nanoparticles are an active research area due to their multiple applications as catalysts in different processes. A variety of preparation techniques have been reported for the synthesis of these nanoparticles, including solvothermal, microwave-assisted, and emulsion techniques. The well-studied solvothermal oleylamine synthesis route comes with the drawback of needing standard air-free techniques and often space-consuming glassware. Here, we present a facile and straightforward synthesis method for size-controlled highly monodisperse nickel nanoparticles avoiding the use of, e.g., Schlenk techniques and space-consuming labware. The nanoparticles produced by this novel synthetic route were investigated using small-angle X-ray scattering, transmission electron microscopy, X-ray diffraction, and X-ray spectroscopy. The nanoparticles were in a size range of 4–16 nm, show high sphericity, no oxidation, and no agglomeration after synthesis. KW - Nanoparticle synthesis KW - Nickel nanoparticles KW - SAXS KW - TEM KW - XAS PY - 2020 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-507531 DO - https://doi.org/10.3390/nano10040713 VL - 10 IS - 4 SP - 713 PB - MDPI AN - OPUS4-50753 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Katsikini, M. A1 - Pinakidou, F. A1 - Paloura, E.C. A1 - Arvanitidis, J. A1 - Ves, S. A1 - Reinholz, Uwe A1 - Ppadomanolaki, E. A1 - Iliopoulos, E. T1 - Simulation of the EXAFS and Raman spectra of InxGa1-xN utilizing the equation of motion routine of FEFF8 N2 - A combined analysis of EXAFS and Raman spectra is applied for the study of InxGa1-xN alloys with 0.3