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 2 3 S and 2 1 S 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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Freitas et al. (1984) studied this question.
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