Modifications of the Impulse Approximation for Ionization and Detachment Cross Sections
- 1 November 1965
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 140 (3A), A764-A768
- https://doi.org/10.1103/physrev.140.a764
Abstract
A bound-state correction is suggested for the Thomson-Gryzinski impulse approximation. Also, it is noted that Slater's rules yield estimates of kinetic-energy expectation values which are more accurate than those used in previous applications of this approximation. These corrections are important for neutral atoms with outer electrons in a state and for all negative ions. Comparison is made with experiment and previous theoretical results.
Keywords
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