Orientation effects in He{sup 2+}-H{sub 2}{sup +} collisions at intermediate collision energies

Orientation effects for electron transfer in keV He{sup 2+}-H{sub 2}{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...

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Bibliographic Details
Published in:Physical review. A, Atomic, molecular, and optical physics Atomic, molecular, and optical physics, 2006-01, Vol.73 (1)
Main Authors: Caillat, J., Sisourat, N., Dubois, A., Sundvor, I., Hansen, J. P., Department of Physics and Technology, University of Bergen, N-5007 Bergen
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
CAPTURE
CHARGE EXCHANGE
COUPLING
CROSS SECTIONS
ELECTRON TRANSFER
ENERGY TRANSFER
HELIUM IONS
HYDROGEN IONS 2 PLUS
IMPACT PARAMETER
ION-ION COLLISIONS
ION-MOLECULE COLLISIONS
KEV RANGE
MOLECULES
ORIENTATION
SEMICLASSICAL APPROXIMATION
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Summary:Orientation effects for electron transfer in keV He{sup 2+}-H{sub 2}{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.
ISSN:1050-2947
1094-1622
DOI:10.1103/PHYSREVA.73.0