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

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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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) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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