MomentT-matrix approach toe+-H scattering. II. Elastic scattering and total cross section at intermediate energies

Abstract
Elastic amplitudes for e+-H scattering are calculated for positron energies from 0.25-1.15 a.u. (∼7-34 eV), an energy range where pickup and impact-ionization channels are open. These amplitudes are used to calculate the elastic e+-H cross section, and assuming unitarity, the total e+-H scattering cross section.