A Mixed Quantum/Classical Approach to Associative Detachment in Low-Energy H– + H Collisions

A theoretical approach, in which the rotational degrees of freedom are treated quantum mechanically while translational degrees of freedom classically or semiclassically, is applied to calculate the total and final-state specific cross sections for the reaction H– + H → H2(v, j) + e– in the range of low collision energies (E = 1–754 meV). The calculated cross sections agree well with the existing experimental and theoretical results. Results are also presented for the inverse dissociative attachment process: H2(v, j) + e– → H– + H.