Journal Article

PreJuSER-32923

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Potential-energy surfaces for charge exchange between singly charged ions and a LiF surface

Wirtz, L. ; Burgdorfer, J. ; Dallos, M. ; Müller, T.FZJ* ; Lischka, H.

2003
APS College Park, Md.

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Please use a persistent id in citations: http://hdl.handle.net/2128/2218  doi:10.1103/PhysRevA.68.032902

Abstract: 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.

Keyword(s): J

Note: Record converted from VDB: 12.11.2012

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Contributing Institute(s):

1. Zentralinstitut für Angewandte Mathematik (ZAM)

Research Program(s):

1. Betrieb und Weiterentwicklung des Höchstleistungsrechners (I03)

Appears in the scientific report 2003
Notes: This version is available at the following Publisher URL: http://pra.aps.org

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