Title

Exchange effects in low energy electron impact ionization of the inner and outer shells of argon

Authors

Authors

D. A. Biava; H. P. Saha; E. Engel; R. M. Dreizler; R. P. McEachran; M. A. Haynes; B. Lohmann; C. T. Whelan;D. H. Madison

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

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

Keywords

DIFFERENTIAL CROSS-SECTIONS; SPIN-POLARIZED ELECTRONS; E, 2E COLLISIONS; INTERMEDIATE ENERGIES; 2E; ATOMS; XENON; DENSITY; NEON; SCATTERING; Optics; Physics, Atomic, Molecular & Chemical

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.

Journal Title

Journal of Physics B-Atomic Molecular and Optical Physics

Volume

35

Issue/Number

2

Publication Date

1-1-2002

Document Type

Article

Language

English

First Page

293

Last Page

307

WOS Identifier

WOS:000173772700010

ISSN

0953-4075

Share

COinS