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Phys. Rev. A 73, 014701 (2006) [4 pages]

Orientation effects in He2+-H<sub>2</sub><sup>+</sup> collisions at intermediate collision energies

J. Caillat, N. Sisourat, and A. Dubois
Laboratoire de Chimie Physique-Matière et Rayonnement, Université Pierre et Marie Curie, F-75231 Paris Cedex 05, France

I. Sundvor and J. P. Hansen
Department of Physics and Technology, University of Bergen, N-5007 Bergen, Norway
Received 16 September 2005; published 20 January 2006

Orientation effects for electron transfer in keV He2+-H<sub>2</sub><sup>+</sup> collisions are calculated based on a semiclassical close coupling model which accurately describes the electronic dynamics. When direct processes dominate it is shown that a configuration where the molecule is perpendicular to the ion momentum is always most favorable. At lower collision energies, rotational couplings and important contributions from low impact parameters can lead to dominant capture cross sections from molecular target aligned parallel with the collision beam.

©2006 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevA.73.014701
DOI: 10.1103/PhysRevA.73.014701
PACS: 34.10.+x; 34.50.Gb; 34.70.+e
  • 34.10.+x
    General theories and models of atomic and molecular collisions and interactions including statistical theories, transition state, stochastic and trajectory models, etc
  • 34.50.Gb
    Electronic excitation and ionization of molecules; intermediate molecular states including lifetimes, state mixing, etc
  • 34.70.+e
    Charge transfer (atoms and molecules)
  • YEAR: 2006
KEYWORDS: helium ions, hydrogen ions, ion-molecule collisions, rotational-vibrational energy transfer, charge exchange

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