Single electron capture in slow H-+A(3+) collisions

The cross section of single-electron capture in slow H- + A(3+) --> H + A(2 +)(n) collisions is calculated in the one-electron approximation by using t he close coupling approach. It is found that the change of the electronic c onfiguration, that takes place at every avoided crossing of the ionic and c ovalent energy terms, is a source of nonadiabatic transitions in the system . This effect leads to a substantial increase of the total cross section an d produces an effective repopulation of individual covalent states.