Charge transfer in ion-molecule collisions

Charge-transfer processes are studied using the vibronic semiclassical method which utilizes a quantal treatment for the electronic and vibrational degrees of freedom while it retains a classical picture for the relative motion. State to state cross sections are calculated for Ar+ + N2 and N2+ + Ar collisions using the ab initio potential energy surfaces of Archirel and Levy. A good agreement with experimental data, including charge transfer, spin-orbit state transitions and vibrational excitations have been obtained over a wide collision range. The calculation for the Ar+ + CO system, which offers more critical conditions, also show a good agreement with the limited amount of available experimental results. 38 refs.; 4 figs.; 3 tabs