Theoretical studies of charged particle collisions

Results from quantum mechanical ab initio studies on mutual neutralization in collision of H+ with H- and H-2(+) with H- are reported. The theoretical studies require computations of the potentials as well as the non-adiabatic interactions among highly excited electronic states. The electronic states are transformed to a diabatic representation and the coupled radial Schrodinger equation is solved using a logarithmic derivative method. For H-2(+) collisions with H-, the process is studied using reduced dimensionality. Calculated cross sections and final state distributions are compared with measurements.