Comparison between quantal and classical scattering dynamics in singly charged ion - atom collisions

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We compare scattering dynamics and charge transfer probabilities obtained from classical trajectory Monte Carlo (CTMC) calculations with previously published quantal and semiclassical calculations in planar collisions. It is shown that, when considering orientation effects, the CTMC method gives relatively good agreement with quantal results for the dominant capture channels. The absolute values of the transfer probabilities and the range of important scattering angles from the CTMC calculations are, however, in quantitative disagreement with quantal calculations and experiments.