Title

Electron impact ionization of helium: test of screening potential in the final state

Authors

Authors

H. P. Saha

Comments

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Abbreviated Journal Title

J. Phys. B-At. Mol. Opt. Phys.

Keywords

ionization; electron; atoms; DIFFERENTIAL CROSS-SECTIONS; ATOMIC-HYDROGEN; Optics; Physics, Atomic, Molecular & Chemical

Abstract

The triple differential cross sections for electron impact ionization of a helium atom is studied using the 70.6 eV incident electron. The initial state which includes both bound and continuum wave functions is calculated using the Hartree-Fock approximation. The final state continuum electron wave functions are computed in the potential of the He+(1s) core. The interaction potential between the two continuum electrons in the final state is approximated with the screening potential determined variationally. It is found that there is qualitative agreement between the present triple differential cross section results and the available experimental and the other theoretical data for equal and unequal sharing of 46 eV excess energy by the two final state continuum electrons. It is concluded that the screening potential which is an approximation to the actual Coulomb interaction potential between the two final state continuum electrons can produce qualitative agreement with the experiment.

Journal Title

Journal of Physics B-Atomic Molecular and Optical Physics

Volume

47

Issue/Number

17

Publication Date

1-1-2014

Document Type

Article

Language

English

First Page

8

WOS Identifier

WOS:000341976100005

ISSN

0953-4075

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