Atomic-basis study of electron transfer inH++ Na andH++ K collisions

Total, as well as partial, electron-transfer cross sections in ${\mathrm{H}}^{+}$ + Na and ${\mathrm{H}}^{+}$ + K collisions have been calculated in the impact-energy region 0.2-20 keV. The calculations are based on the atomic-orbital expansion method. Resulting total-transfer cross sections are in good agreement with experimental data by Grüebler, Schmelzbach, König, and Marmier, and $2s$ partial-transfer cross sections agree with recent measurements by Berkowitz and Zorn, though in the case of ${\mathrm{H}}^{+}$ + Na collisions only up to a normalization factor. Possible reasons for discrepancies with results from other (mutually disagreeing) theoretical studies are discussed.