Title

Exchange Effects In Low Energy Electron Impact Ionization Of The Inner And Outer Shells Of Argon

Abstract

First order distorted wave Born approximation (DWBA) triple differential cross sections are reported for low-energy electron-impact ionization of the inner 3s and outer 3p shells of argon. Previous DWBA works have demonstrated that experiment and theory are not in accord for low energy ionization of inert gases and here we investigate the importance of exchange scattering. Different approximations for treating exchange scattering are investigated. It is shown that exchange scattering is particularly important for 3s ionization. Even with a proper treatment of exchange, the first order calculations are still not in satisfactory agreement with experiment. Consequently higher order effects will have to be included to achieve a satisfactory description of the low-energy ionization process. We also investigated both the Hartree-Fock and optimized potential methods for calculating atomic wavefunctions and static potentials and found that both methods produced almost the same cross sections.

Publication Date

1-28-2002

Publication Title

Journal of Physics B: Atomic, Molecular and Optical Physics

Volume

35

Issue

2

Number of Pages

293-307

Document Type

Article

Personal Identifier

scopus

DOI Link

https://doi.org/10.1088/0953-4075/35/2/308

Socpus ID

0037185685 (Scopus)

Source API URL

https://api.elsevier.com/content/abstract/scopus_id/0037185685

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