Wavefunction effects in theoretical (e,2e) cross sections for ionization of helium with excitation of the residual ion
- 14 November 1991
- journal article
- Published by IOP Publishing in Journal of Physics B: Atomic, Molecular and Optical Physics
- Vol. 24 (21) , 4567-4581
- https://doi.org/10.1088/0953-4075/24/21/010
Abstract
Calculations of triple differential cross sections for the process where impact of a moderately energetic electron on a two-electron target simultaneously ejects one of the electrons and excites the other are made in the framework of a first Born approximation without exchange. Results obtained using ejected electron wavefunctions calculated with Coulomb potentials of different effective charge, with the static potential due to the unperturbed residual ion, or with Klapisch-type parametric potentials, are compared with experimental data. Strong dependence on the final state wavefunction is found, notably for the ratio between contributions from excitation of the 2s0, 2p0 and 2p+or-1 residual ion states. The cross sections, both globally and for the individual contributions, are however insensitive to the amount of correlation in the initial state wavefunctions.Keywords
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