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Int. J. Mol. Sci. 2002, 3(3), 220-229; doi:10.3390/i3030220
Article

Low-Energy Charge Transfer in Multiply-Charged Ion-Atom Collisions Studied with the Combined SCVB-MOCC Approach

1, 2, 1, 2, 1 and 3
1 Department of Chemistry, University of Liverpool, PO Box 147, Liverpool L69 7ZD, UK 2 Department of Physics and Astronomy and Center for Simulational Physics, The University of Georgia, Athens, GA, 30602-2451, USA 3 Department of Physics, University of Nevada, Las Vegas, NV, 89154-4002, USA
* Author to whom correspondence should be addressed.
Received: 15 December 2001 / Accepted: 16 January 2002 / Published: 28 March 2002
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Abstract

A survey of theoretical studies of charge transfer involving collisions of multiply-charged ions with atomic neutrals (H and He) is presented. The calculations utilized the quantum-mechanical molecular-orbital close-coupling (MOCC) approach where the requisite potential curves and coupling matrix elements have been obtained with the spin-coupled valence bond (SCVB) method. Comparison is made among various collision partners, for equicharged systems, where it is illustrated that even for total charge transfer cross sections, scaling-laws do not exist for low-energy collisions (i.e. < 1 keV/amu). While various empirical scaling-laws are well known in the intermediateand high-energy regimes, the multi-electron configurations of the projectile ions results in a rich and varied low-energy dependence, requiring an explicit calculation for each collision-partner pair. Future charge transfer problems to be addressed with the combined SCVB-MOCC approach are briefly discussed.
Keywords: charge transfer; spin-coupled theory; valence bond charge transfer; spin-coupled theory; valence bond
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Cooper, D.L.; Stancil, P.C.; Turner, A.R.; Wang, J.G.; Clarke, N.J.; Zygelman, B. Low-Energy Charge Transfer in Multiply-Charged Ion-Atom Collisions Studied with the Combined SCVB-MOCC Approach. Int. J. Mol. Sci. 2002, 3, 220-229.

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