Errea LF, Illescas C, Macías A, Méndez L, Pons B, Rabadán I, Riera A. Influence of nuclear exchange on nonadiabatic electron processes in H(+)+H2 collisions.
J Chem Phys 2010;
133:244307. [PMID:
21197993 DOI:
10.1063/1.3518417]
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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.
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