Experimental and Theoretical (e, 2e) Studies of Argon (3p) Ionization in Asymmetric Geometry

Abstract

Experimental and theoretical triple-differential cross sections (TDCS) are presented for ionization of the outer 3p shell of argon by 200 eV electrons scattered through an angle of 15° and for ejected electron energies of 2, 5, 10 and 20 eV. A distorted-wave Born approximation (DWBA) and a hybrid DWBA-R-matrix (DWBA-RM2) calculation both reproduce the shapes of the TDCS when the slow electron is ejected near the momentum-transfer direction. Near the opposite direction, the DWBA-RM2 model also achieves good agreement with experiment for the higher ejected electron energies, but discrepancies are observed for the lower energies. This three-way joint study emphasizes that it is essential to include a proper treatment of exchange in modelling low-energy ionization.

Department(s)

Physics

Sponsor(s)

National Science Foundation (U.S.)
Great Britain. Engineering and Physical Sciences Research Council

Keywords and Phrases

Atomic and Molecular Physics; Atomic Excitation; Atomic Ionization

International Standard Serial Number (ISSN)

0953-4075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2005 Institute of Physics - IOP Publishing, All rights reserved.

Publication Date

01 Feb 2005

Link to Full Text

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