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Abstract
Electron-impact-excitation cross sections for Zn{sup +} are calculated in a multiple-{ital LS}-term close-coupling approximation. Total cross sections for the 4{ital s}{r arrow}4{ital p} transition are compared with crossed-beams (Rogers {ital et} {ital al}., Phys. Rev. A 25, 681 (1982)) and merged-beams (Smith {ital et} {ital al}., Phys. Rev. Lett. 67, 30 (1991)) experiments. Taking into account cascade effects, the close-coupling calculations and the crossed-beams measurements are found to be in reasonable agreement over a wide energy range. When only the forward-angle part of the cross section is calculated, good agreement with the merged-beams measurements is found near the excitation threshold, but at the higher energies the experimental value is somewhat lower than the theory predicts.
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