title: Influence of nuclear exchange on nonadiabatic electron processes in H(+)+H2 collisions.
abstract: H(+)+H(2) collisions are studied by means of a semiclassical approach that explicitly accounts for nuclear rearrangement channels in nonadiabatic electron processes. A set of classical trajectories is used to describe the nuclear motion, while the electronic degrees of freedom are treated quantum mechanically in terms of a three-state expansion of the collision wavefunction. We describe electron capture and vibrational excitation, which can also involve nuclear exchange and dissociation, in the E = 2-1000 eV impact energy range. We compare dynamical results obtained with two parametrizations of the potential energy surface of H(3)(+) ground electronic state. Total cross sections for E > 10 eV agree with previous results using a vibronic close-coupling expansion, and with experimental data for E < 10 eV. Additionally, some prototypical features of both nuclear and electron dynamics at low E are discussed.
authors.affiliation: Laboratorio Asociado al CIEMAT de Física Atómica y Molecular en Plasmas de Fusión, Departamento de Química, Universidad Autónoma de Madrid, Madrid-28049, Spain.
authors.forename: L F
authors.initials: LF
authors.lastname: Errea
authors.forename: Clara
authors.initials: C
authors.lastname: Illescas
authors.forename: A
authors.initials: A
authors.lastname: Macías
authors.forename: L
authors.initials: L
authors.lastname: Méndez
authors.forename: B
authors.initials: B
authors.lastname: Pons
authors.forename: I
authors.initials: I
authors.lastname: Rabadán
authors.forename: A
authors.initials: A
authors.lastname: Riera