An even simpler method for calculating X-ray absorption parameters

A simple scheme is described whereby X-ray absorption spectra, in clouding the very strong, rapidly varying structure near an absorption edge, may be calculated using only a short program and small amounts of computer time. Comparison with experiment shows good agreement right across the periodic table for K and L edges, with rather poorer agreement for M contributions. The method is of use in situations where a knowledge of the fine detail of the absorption spectrum is not needed, but where an accurate reproduction of the absorption over a wide energy range, and of the major structure near the edge, is. It is also of use in calculating matrix elements for use in EXAFS calculations.