Orientation and alignment in charge exchange processes involving sodium atoms studied by semi-classical molecular theory

The semi-classical molecular model is applied to study the charge exchange processes in the H⁺-Na 3p and Li⁺-Na 3p systems in the keV energy range. The dependence of the charge exchange on the orientation and the alignment of the initial or final state is obtained for the transition probabilities and for the differential cross sections. The 14 state present model for the H⁺-Na system is in good agreement with the experimental differential cross sections. The alignment is explained by orientation occurring in the transfer region. The cross sections predicted with a 28 state model for Li⁺-Na exhibit similar behaviour as for H⁺-Na.