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Convergent close-coupling calculations of positron–helium scattering at intermediate to high energies

Wu, H., Bray, I., Fursa, D.V. and Stelbovics, A.T. (2004) Convergent close-coupling calculations of positron–helium scattering at intermediate to high energies. Journal of Physics B: Atomic, Molecular and Optical Physics, 37 (6). pp. 1165-1172.

Link to Published Version: http://dx.doi.org/10.1088/0953-4075/37/6/002
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Abstract

The single-centred convergent close-coupling method has been applied to positron-helium scattering at energies from the first ionization threshold to 1 keV for calculating one-electron excitation and ionization processes. Total scattering, positronium formation plus single ionization (unresolved), and target excitation cross sections have been calculated. It is found that the often-used frozen-core approximation for the target structure leads to a small but systematic overestimation of the cross sections. Generally, the agreement between the present and most recent calculations, as well as experiment, is satisfactory.

Publication Type: Journal Article
Publisher: IOP Publishing Ltd
URI: http://researchrepository.murdoch.edu.au/id/eprint/33502
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