Title

Electron Impact Ionization Of Helium: Test Of Screening Potential In The Final State

Keywords

atoms; electron; ionization

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. © 2014 IOP Publishing Ltd.

Publication Date

9-14-2014

Publication Title

Journal of Physics B: Atomic, Molecular and Optical Physics

Volume

47

Issue

17

Number of Pages

-

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/0953-4075/47/17/175005

Socpus ID

84906717865 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/84906717865

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