Rearrangement processes in low-energy positron scattering on hydrogen and the alkali metals
ORAL
Abstract
We apply the two-center convergent close-coupling (CCC) method to the calculation of low-energy positron scattering on atomic hydrogen and the alkali metals. Our primary interest is in the near-threshold exothermic rearrangement processes. Examples include positronium (Ps) formation for the alkali metals at near-zero positron energy, and (anti)hydrogen formation in near-threshold Ps-(anti)proton scattering. The cross sections for such processes are infinite at threshold, and we investigate their behavior in the vicinity of threshold.
*This work is supported by the Australian Research Council.
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