Tests of an adiabatic perturbation theory for symmetric charge exchange

Abstract

A recently developed adiabatic perturbation theory for symmetric molecular charge exchange is tested against accurate calculations over a range of energies from 0.5 to 32 eV. Good agreement is found over the whole energy range, and the discrepancies are roughly the same at all energies so that an adiabatic basis set should be good even at high energies. The total charge exchange cross section is calculated for specific initial vibrational states. It depends strongly on the initial state, and it oscillates as a function of energy, so that this cross section may be a useful way to fit a potential to experimental data