Convergent TCAO close-coupling calculations for electron transfer, excitation and ionization in intermediate keV He2+-H collisions

Abstract

Our recently developed two-centre atomic orbital (TCAO) close-coupling method is applied to He2+-H(1s) collisions in the impact energy range from 20-400 keV amu(-1). Convergent cross sections are obtained for this system by using a large number of bound and pseudostate basis functions on the target and a limited number of bound states on the projectile. Cross sections for electron transfer to 1s, 2l, 3l, 4l and 5l, for excitation to 2l, 3l, 4l and 5l and for ionization are presented and compared with available experimental data and other theoretical calculations. The accuracy of the previous TCAO close-coupling calculations is challenged and the reliability of some experimental data for this system is questioned.