Ionization of hydrogen by positron impact near the fragmentation threshold

Citation:

Rost, J.M. & Heller, E.J. Ionization of hydrogen by positron impact near the fragmentation threshold. Physical Review A 49, R4289 (1994).

Abstract:

The semiclassical approximation of Feynman’s path integral is used to calculate the S matrix for the positron-impact ionization of hydrogen. The formulation provides a full scattering amplitude, and more importantly does not require knowledge of the asymptotic three-body Coulomb state in the continuum. In the limit of vanishing excess energy, the results confirm Wannier’s classical model for fragmentation [Phys. Rev. 90, 817 (1953)]. The experimentally observable ratio of fragmentation versus total ionization (including positronium formation) is predicted.

Publisher's Version

Last updated on 10/07/2016