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

Abstract

We have developed a method for which a variety of reactive scattering processes involving the H2 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(1s)+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. Published by the American Physical Society 2024