Low-energy single electron capture, target excitation and ionization in He2+ + Na(3s) collisions

Abstract

Extensive semiclassical atomic orbitals close-coupling calculations have been performed to investigate single electron capture, excitation and ionization cross sections for He2+ + Na(3s) collisions from 2 to 20 keV u−1. Special attention was paid to transition channels where significant discrepancies among theories and experiments were reported in this energy region. The stability of the calculated inelastic cross sections with respect to the choice of basis functions has been examined. The present calculations for single electron capture, target excitation and ionization cross sections are found to be in good agreement with existing experimental data, as well as with previous theoretical calculations. In particular, the total ionization and partial electron capture cross sections into n = 2, 3, 4 and n ⩾ 5 shells are in excellent agreement with the recent experimental measurements performed using the MOTRIMS technique (Knoop et al 2005 J. Phys. B: At. Mol. Opt. Phys. 38 1987).