Reference : Potential-energy surfaces for charge exchange between singly charged ions and a LiF s...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Physics
http://hdl.handle.net/10993/17582
Potential-energy surfaces for charge exchange between singly charged ions and a LiF surface
English
Wirtz, Ludger mailto [Technische Universität Wien = Vienna University of Technology - TU Vienna > Institute for Theoretical Physics]
Burgdorfer, J. [Technische Universität Wien = Vienna University of Technology - TU Vienna > Institute for Theoretical Physics]
Dallos, M. [Technische Universität Wien = Vienna University of Technology - TU Vienna > Institute for Theoretical Chemistry and Structural Biology]
Muller, Thomas [Technische Universität Wien = Vienna University of Technology - TU Vienna > Institute for Theoretical Chemistry and Structural Biology]
Lischka, H. [Technische Universität Wien = Vienna University of Technology - TU Vienna > Institute for Theoretical Chemistry and Structural Biology]
2003
Physical Review. A
American Physical Society
68
3
Yes
International
1050-2947
1094-1622
College Park
MD
[en] We analyze the adiabatic potential-energy surfaces relevant for neutralization of singly charged ions in slow vertical incidence onto a lithium fluoride surface. The surface is represented by a cluster of varying size augmented by point charges of alternating sign in order to include the proper Madelung potential of the ionic crystal. Our calculation proceeds on the multiconfiguration self-consistent-field and multireference configuration-interaction levels. Size-consistency corrections based on the Davidson correction and multireference averaged quadratic coupled cluster methods are included as well. We emphasize the importance of a proper treatment of electron correlation signifying the polarization of the surrounding cluster environment in ab initio calculations of charge transfer at surfaces. From the topology of the surfaces, in particular the existence or absence of avoided crossings (or, more generally, conical intersections), qualitative predictions for the neutralization process can be made. The comparative analysis of potential curves for H+, C+, S+, and Ne+ projectiles provides an explanation for the recently observed threshold behavior for potential sputtering.
http://hdl.handle.net/10993/17582
10.1103/PhysRevA.68.032902

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