An eleven-state electron-helium scattering calculation

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, , Citation L C G Freitas et al 1984 J. Phys. B: Atom. Mol. Phys. 17 L303 DOI 10.1088/0022-3700/17/9/007

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1 Dept. of Appl. Maths. & Theoretical Phys., Queen's Univ of Belfast, Belfast, UK

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0022-3700/17/9/L303

Abstract

The first results of an eleven-state R-matrix calculation on electron-helium scattering are presented. The resonance structure near the n=3 states of helium is examined and resonance parameters calculated. There is good agreement with recent experimental observations of the 23S and 21S metastable-state excitation cross sections. Earlier five-state calculations are shown to have significantly overestimated these cross sections above 22 eV.

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