Asymptotic theory of the one- and two-electron processes in slow collisions of atomic ionswith diatomic molecules

摘要

We apply the asymptotic method and a semiclassical coupled-channel approach to study the one- andtwo-electronic processes occurring in the course of slow collisions between multiply charged atomic ion anddiatomic molecules with two active electrons. The matrix elements responsible for different processes of singleand double electron transfer are calculated asymptotically correctly (for large distances R between interactingparticles) in the framework of the nonperturbative Landau-Herring approach. The methods are applied forstudy of single and double electron transfer in H_2+He~(2+)collisions at impact energies 0.1-30 keV/amu. Ourcalculations are in fairly good agreement with available experimental data and theoretical calculations of otherauthors.