Ab initio calculations of charge transfer in He+ colliding with Ne

Abstract

The charge-transfer cross sections for He+ colliding with Ne atoms are calculated for the incident energy ranging from 20 eV to 5 keV by a quantum-mechanical molecular-orbital close-coupling method, which utilizes ab initio adiabatic potentials, radial and rotational coupling matrix elements obtained with a multireference configuration interaction method. Total and state-selective cross sections and rate coefficients are presented. It is found that for the collision energy E < 0.8 keV, the main charge-transfer channels are capture to the 1s2s and 1s2p excited states of He, while for E > 0.8 keV, the capture to the 1s2 ground state becomes dominant. It is also found that rotational coupling becomes important for E > 0.6 keV.