Abstract
The present study discusses the best experimental conditions for the quantitative analysis of gold jewellery artefacts by ion beam techniques (PIXE, RBS, PIGE and NRA). Special attention is given to the detection of enhancement or depletion below the surface, down to 10 microns, without any sampling or destruction. PIXE is certainly the most interesting technique for this purpose and the optimal geometrical arrangement of the experiment is described: orientation of the incident beam relative to sample surface, selection of the characteristic signals, use of reference material, choice of the detector and incident particle energy and type, computation of absorption and secondary fluorescence effects.
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