Inelastic processes from vibrationally excited states in slow H^{+}+H_{2} and H+H_{2}^{+} collisions: Excitations and charge transfer (original) (raw)

We present a detailed quantum-mechanical study for dissociation of vibrationally excited molecular diatomic target, of H 2 ( i ) by proton impact and H 2 ϩ ( i ) by hydrogen-atom impact, in the range of center-of-mass collision energies from threshold to 9.5 eV. The dominant dissociation mechanisms in this three-atomic collision system are identified and their effectiveness analyzed for different collision geometries. The cross section calculations for direct and charge-transfer dissociation are performed by solving the Schrödinger equation for the nuclear and electronic motions on the two lowest diabatic electronic surfaces of H 3 ϩ , and by using an expansion of nuclear wave function in a vibrational basis containing all discrete H 2 and H 2 ϩ states and a large number of pseudostates from each of the corresponding discretized continua. The energy and angular spectra of the fragments are also calculated and analyzed.