Dissociative recombination and resonant ion-pair formation in electron collisions with HD

We have developed a method for which a variety of reactive scattering processes involving the H 2 reaction complex can be studied using the same set of potential curves and couplings. The method is based on a close -coupling approach in a strict diabatic representation. By rigorously incorporating nonadiabatic couplings among bound states, we enable the computation of final -state distributions. Loss into the ionization continuum is accounted for with a nonlocal complex potential matrix. The method has successfully been applied in studies of H + + H - mutual neutralization and H(1 s ) + H( ns ) associative ionization. In this paper, we investigate the applicability of this method to dissociative recombination and resonant ion -pair formation in electron collisions with HD + . The importance of a nonlocal description of autoionization is demonstrated. Calculated cross sections and final -state distributions are compared with results from experiments and previous theoretical studies.