Dissociation of H⁺₂ions by collisions with electrons

We have studied the electron impact dissociation of vibrationally excited H + 2 . A distribution of initial vibrational states given by the overlap factors between the vibrational ground state of H 2 and different vibrational levels of H + 2 has been considered. It was found that the relative contributions of the initial vibrational levels to the dissociative excitation cross section mimic the vibrational distribution of the H + 2 molecular ion for electron energies larger than the energy difference between the energy of the repulsive state 2 Σ + u and that of the lowest vibrational level of the ground state X 2 Σ + g at the outer classical turning point.