Modifications of the HEX program for fast automatic resolution of PIXE-spectra

The computer program ‘HEX’ for resolving PIXE-spectra has been modified. By irradiating standard foils, the escape peak ratios for x-ray peaks in the energy interval 3.3-10.6 keV have been measured. The results have been compared with theoretical calculations and experimental results of other research groups. The escape peaks have been included in the computer code. Pile-up peaks in the x-ray spectrum are also fitted by the modified computer program. This procedure is independent of the count rate and the pile-up interval. In addition, an effective routine for rejecting small x-ray peaks has been developed.

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