TY - CONF A1 - Berger, Achim A1 - Görner, Wolf A1 - Haase, Oskar T1 - With spezialized Irradiation and Detector Twins to High-Precision Photon T2 - Activation Analysis 14th Radiochemical Conference CY - Mariánské Lázne, Czech Republic DA - 2002-04-14 PY - 2002 AN - OPUS4-2969 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Berger, Achim A1 - Alber, D. T1 - Bestimmung von Kobalt in Nickel bei Gehalten im sub-mg/g Bereich T2 - GDCh Jahrestagung Chemie 2003, 19. Seminar Aktivierungsanalyse CY - Munich, Germany DA - 2003-10-06 PY - 2003 AN - OPUS4-3797 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Berger, Achim A1 - Alber, D. T1 - Bestimmung von Kobalt in Nickel bei Gehalten im sub-mu/g Bereich 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 - 4 PB - Gesellschaft Deutscher Chemiker CY - Frankfurt am Main AN - OPUS4-2675 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Berger, Achim A1 - Bukalis, Gregor A1 - Alber, D. T1 - Determination of cobalt in nickel in the SUB-PPM level with cold neutrons T2 - 11th International Conference on Modern Trends in Activation Analysis (MTAA-11) CY - Guildford, England DA - 2004-06-20 PY - 2004 AN - OPUS4-3635 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Görner, Wolf A1 - Berger, Achim A1 - Ecker, Klaus A1 - Haase, Oskar A1 - Hedrich, Martina A1 - Segebade, Christian A1 - Weidemann, Gerd A1 - Dudek, Gabriele T1 - Broad band application of combined instrumental photon and neutron activation analysis PY - 2001 SN - 0236-5731 SN - 1588-2780 SN - 1417-2097 N1 - Geburtsname von Dudek, Gabriele: Wermann, G. - Birth name of Dudek, Gabriele: Wermann, G. VL - 248 IS - 1 SP - 45 EP - 52 PB - Elsevier Sequoia CY - Lausanne AN - OPUS4-11229 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 (1606–1669) 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 French–German 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 - 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 - CONF A1 - Berger, Achim A1 - Merchel, Silke T1 - Nitrogen determination in boron carbide by IPAA and gas fusion analyses T2 - GDCh-Wissenschaftsforum Chemie 2007 CY - Ulm, Germany DA - 2007-09-16 PY - 2007 AN - OPUS4-16301 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Berger, Achim A1 - Görner, Wolf A1 - Haase, Oskar A1 - Kipphardt, Heinrich A1 - Ostermann, Markus A1 - Segebade, Christian T1 - Schritte auf dem Weg zu einer "idealen" Kernstrahlungsspektrometrie T2 - 21. Seminar Aktivierungsanalyse und Gammaspektroskopie (SAAGAS 21) CY - Mainz, Germany DA - 2007-03-21 PY - 2007 AN - OPUS4-16640 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Berger, Achim A1 - Alber, D. A1 - Bukalis, G. T1 - Determination of cobalt in nickel in the sub-ppm level with cold neutrons KW - Neutronenaktivierungsanalyse KW - Neutronenstrahl KW - Referenzmaterialien PY - 2007 SN - 0236-5731 SN - 1588-2780 SN - 1417-2097 VL - 271 IS - 1 SP - 251 EP - 253 PB - Elsevier Sequoia CY - Lausanne AN - OPUS4-14568 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -