[en] We present a simulation of the neutralization of highly charged ions in front of a lithium fluoride surface including the close-collision regime above the surface. The present approach employs a Monte-Carlo solution of the Liouville master equation for the joint probability density of the ionic motion and the electronic population of the projectile and the target surface. It includes single as well as double particle-hole (de)excitation processes and incorporates electron correlation effects through the conditional dynamics of population strings. For slow projectiles and normal incidence, the ionic motion depends sensitively on the interplay between image acceleration towards the surface and repulsion by an ensemble of positive hole charges in the surface ("trampoline effect"). For Ne10+ we find that image acceleration is dominant and no collective backscattering high above the surface takes place. (C) 2004 Elsevier Ltd. All rights reserved.
Disciplines :
Physics
Author, co-author :
Burgdorfer, J.; Technische Universität Wien = Vienna University of Technology - TU Vienna > Institute for Theoretical Physics
Wirtz, Ludger ; Institute for Theoretical Physics, Vienna University of Technology / Department of Material Physics, University of the Basque Country, and Donostia International Physics Center
Reinhold, C. O.; Oak Ridge National Laboratory > Physics division
Lemell, C.; Technische Universität Wien = Vienna University of Technology - TU Vienna > Institute for Theoretical Physics
Language :
English
Title :
Multi-electron dynamics for neutralization of highly charged ions near surfaces
Publication date :
2004
Event name :
16th International Conference on Ion-Surface Interactions (ISI) Zvenigorod RUSSIA Russian Acad Sci
Event date :
AUG 25-29, 2003
Audience :
International
Journal title :
Vacuum
ISSN :
0042-207X
Publisher :
Pergamon Press
Volume :
73
Issue :
1
Pages :
3-7
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
AUG 25-29, 2003
16th International Conference on Ion-Surface Interactions (ISI)
Zvenigorod
RUSSIA
Russian Acad Sci