Ionization in heavy-particle collisions: Multichannel treatment with discretization of the electronic continuum

Abstract
A theoretical treatment of ionization in atomic collisions is developed for quantum-mechanical and semiclassical relative motions. It is based on a molecular-wave-function expansion containing both discrete and continuum spectrum states. The continuum is discretized by further expansion, which leads to normalizable "electronic state packets." A procedure is described to calculate scattering amplitudes that avoids having to orthogonalize continuum states to all the (usually unknown) discrete ones. DOI: http://dx.doi.org/10.1103/PhysRevA.25.204 © 1982 The American Physical Society