Abstract
Distorted-wave Born approximation (DWBA) calculations are reported for inner shell ionization of Ar(2p), Ar(2s) and Ne(1s) in the energy range 2-3 keV. Comparison is made with experimental data of Bickert et al. Agreement between DWBA and experiment is very good and much better than in previous comparisons with first Born type theories. The results show the importance of taking proper account of the strong static potential of a 'heavy' atom, particularly in inner shell ionization where the ionization process takes place in a region in which the static potential is at its strongest. Some interesting structures outside the angular range of the experimental data are revealed, these would be worthy of further experimental investigation. The electron momentdensity of the 2s orbital is measured for the first time and found to be in good agreement with the Hartree-Fock calculations of Clementi and Roetti (1974).
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