THEORETICAL INVESTIGATIONS OF CHARGE-EXCHANGE WITH ION EXCITATION IN ATOMIC-COLLISIONS AT THERMAL ENERGIES

The process of charge exchange with ion excitation is investigated the oretically. The multielectron and multichannel model for the process u nder consideration is proposed. The formulas for two-electron exchange coupling are obtained and discussed. The model is applied to the inve stigation of charge exchange with ion excitation in collisions of heli um ions with mercury atoms at thermal energies. The matrix elements of exchange coupling, the adiabatic potential energies, the partial cros s section, and the partial rate constant for the process under conside ration are calculated. The matrix elements of exchange coupling in thi s case are mainly determined by electron-core interactions. The effect ive potentials are used for these interactions. The calculated partial rate constant for excitation of Hg+(7p P-2(3/2)) agrees with experime ntal data.