“…Except for a preliminary calculation 4 on H À + H 2 + in reduced dimensionality, ab initio and fully quantum mechanical studies of the mutual neutralization reaction are so far limited to collisions of atomic ions (see for example [5][6][7] and references therein). There have been numerous studies of mutual neutralization reactions where the nuclear motion is described classically, and the transition probabilities are estimated using, e.g., the Landau-Zener model.…”