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Influence of Inelastic Processes on Fast-Atom-Surface Diffraction
Aigner, F.; Simonovic, N.; Solleder, B. et al.
2008In Journal of Physics. Conference Series, 133
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Abstract :
[en] Diffraction of fast helium atoms at alkali-halide surfaces under grazing angles of incidence shows intriguing diffraction patterns. The persistence of quantum coherence is remarkably strong, even though high surface temperatures and high (keV) kinetic energies of the incident atoms would strongly suggest the dominance of dissipative and decohering processes. The main source of decoherence is the excitation or absorption of surface vibrations upon impact. The momentum transfer between the surface and the incident helium atom depends on the amplitude of the thermal vibrations of the surface atoms and the energy of the incident particle. We present an ab initio simulation of the quantum diffraction of fast helium beams at a LiF (100) surface in the < 110 > direction, and compare with recent experimental diffraction data.
Disciplines :
Physics
Author, co-author :
Aigner, F.;  Vienna University of Technology > Institute for Theoretical Physics
Simonovic, N.;  Institute for Theoretical Physics, Vienna University of Technology / Institute of Physics, Belgrade
Solleder, B.;  Vienna University of Technology > Institute for Theoretical Physics
Wirtz, Ludger ;  CNRS > IEMN
Burgdörfer, Joachim;  Vienna University of Technology > Institute for Theoretical Physics
Language :
English
Title :
Influence of Inelastic Processes on Fast-Atom-Surface Diffraction
Publication date :
2008
Event name :
24TH SUMMER SCHOOL AND INTERNATIONAL SYMPOSIUM ON THE PHYSICS OF IONIZED GASES
Event date :
25–29 August 2008
By request :
Yes
Audience :
International
Journal title :
Journal of Physics. Conference Series
ISSN :
1742-6588
eISSN :
1742-6596
Publisher :
Institute of Physics Publishing IOP, Bristol, United Kingdom
Special issue title :
24TH SUMMER SCHOOL AND INTERNATIONAL SYMPOSIUM ON THE PHYSICS OF IONIZED GASES
Volume :
133
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
AUG 25-29, 2008 24th Summer School and International Symposium on Physics of Ionized Gases Novi Sad SERBIA Malovic, G Popovic, L Dimitrijevic, M
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