Analysis of trace elements in gold alloys by SR-XRF at high energy at the BAMline |
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| Authors: | M.F. Guerra M. Radtke H. Riesemeier |
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| Affiliation: | a Centre de Recherche et de Restauration des Musées de France, UMR 171 CNRS, Palais du Louvre - 14, quai François Mitterrand, 75001 Paris, France
b Bundesanstalt für Materialforschung und - prüfung (BAM), Richard-Willstätter-Straße 11, 12489 Berlin, Germany |
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| Abstract: | 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. |
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| Keywords: | 78.70.En 82.82.d 29.20.dk |
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