Abstract
A procedure has been developed for the analysis of heavy elements in alloys where the ordinary PIXE measurements have interferences. To obtain better sensitivity the method employs the detection of characteristic K X-rays by a small volume Ge(Li) detector and a higher proton energy than in ordinary PIXE measurements. As practical examples the determination of lead in Zn/Pb alloys and of tin in lead are given. The optimum conditions for the analyses have been determined, e.g., the optimum proton energy, experimental arrangement and absorber choice. Detection levels of ~500ppm for lead and ~10 ppm for tin in alloys are obtainable under practical conditions.
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