A systematic study of relativistic (e, 2e) collisions in comparison with experiment
- 28 March 1992
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 25 (6) , 1297-1305
- https://doi.org/10.1088/0953-4075/25/6/020
Abstract
Triply-differential cross sections for K-shell ionization by fast electron impact are calculated within the first-order Coulomb Born approximation for the case of a coplanar symmetric geometry. Comparison is made with experimental data on 300 keV and 500 keV e-+ Cu, Ag and Au. For the two lighter targets, the binary peak region is reasonably well described by a theory which uses semirelativistic electronic eigenfunctions to the target field, provided spin-flip is included. For the gold target, the Coulomb Born approximation seriously overestimates the data, pointing to the necessity of a fully relativistic description of the electronic states.Keywords
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