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Experimental and theoretical (e, 2e) studies of argon (3p) ionization in asymmetric geometry

Lookup NU author(s): Mark Andrew Stevenson, Emeritus Professor Albert Crowe

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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.

Publication metadata

Author(s): Stevenson M, Leighton GJ, Crowe A, Bartschat K, Vorov OK, Madison DH

Publication type: Article

Publication status: Published

Journal: Journal of Physics B: Atomic, Molecular and Optical Physics

Year: 2005

Volume: 38

Issue: 4

Pages: 433-440

ISSN (print): 0953-4075

ISSN (electronic): 1361-6455

Publisher: Institute of Physics Publishing Ltd.

URL: http://dx.doi.org/10.1088/0953-4075/38/4/010

DOI: 10.1088/0953-4075/38/4/010

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