Electron transfer, excitation, and ionization inα-Hcollisions studied with a Sturmian basis

Abstract

Cross sections have been determined for electron transfer, direct excitation, and ionization in collisions between protons and $\text{H}(1s)$ atoms at proton energies from 1 keV to 16 MeV, extending the pioneering work by Shakeshaft [R. Shakeshaft, Phys. Rev. A 14, 1626 (1976); Phys. Rev. A 18, 1930 (1978)] with a much smaller basis and energy range, and following the author's work for other collisional systems [T. G. Winter, Phys. Rev. A 76, 062702 (2007)]. Transfer as well as excitation cross sections into individual states up to $3d$ (excitation up to $4f$ at the higher energies) have been determined with several coupled-Sturmian-pseudostate bases, and tests of basis sensitivity have been carried out. These and ionization cross sections have been compared with experimental, other coupled-state, and numerical results. Ionization and excitation cross sections have also been compared with corresponding Born results at higher energies.