Abstract
A second X-ray production database is introduced into GUPIX to complement the existing theoretical (ECPSSR–DHS) database and to provide some estimate of analytical uncertainty due to this aspect of GUPIX; it is based on published compilations and analyses of large numbers of measured K and L subshell X-ray production cross-sections. The two databases are compared through analysis of single-element standards and standard reference materials. Good agreement is observed for the case of K X-rays. In contrast, neither the theoretical nor the “reference” database appears to be entirely satisfactory in the case of L X-rays. New work is required on L subshell X-ray production cross-sections using protons. The tools in GUPIX for film thickness determination are expanded, and tested using the two alternative databases.
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