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Title: Highly charged ions impinging on a stepped metal surface under grazing incidence

Abstract

We report on energy loss measurements and charge state distributions for 60 keV N{sup 6+} and 75 keV N{sup 5+} ions scattered off a Pt(110)(1x2) single crystal surface. In particular, the influence of surface steps on the energy loss and the outgoing charge states is discussed. The scattering angle and the angle of incidence are varied. We use grazing incidence conditions, i.e., the momentum perpendicular to the surface is low enough to prevent penetration through the first atomic layer. Image charge effects are observed leading to an additional projectile acceleration towards the surface. Outgoing charge states are detected from 1+ up to 3+. Axial channeling conditions are defined by scattering along the azimuthal [001] direction, i.e., the projectiles are guided along the [001]-atomic rows. The energy loss for axial channeling is found to be somewhat larger and the energy distribution to be broadened in comparison with the spectra for planar channeling conditions. The broadening is attributed to the interaction of the projectiles with the side wall potentials of the surface channels. We find a strong increase in the energy loss with increasing scattering angle, which exceeds the calculated contribution of the elastic energy transfer by orders of magnitudes. These increasedmore » energy losses are attributed to the interaction of the ions with the surface steps.« less

Authors:
 [1]; ;  [2];  [3]
  1. KVI Atomic Physics, Rijksuniversiteit Groningen, Zernikelaan 25, NL-9747 AA Groningen (Netherlands)
  2. Hahn-Meitner-Institut Berlin, Glienicker Strasse 100, D-14109 Berlin (Germany)
  3. Universitaet Osnabrueck, D-49069 Osnabrueck (Germany)
Publication Date:
OSTI Identifier:
20636389
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 67; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.67.052901; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 36 MATERIALS SCIENCE; CATIONS; CHANNELING; CHARGE EXCHANGE; CHARGE STATES; COMPARATIVE EVALUATIONS; ENERGY LOSSES; ENERGY SPECTRA; ENERGY TRANSFER; INCIDENCE ANGLE; ION-ATOM COLLISIONS; KEV RANGE; LAYERS; MONOCRYSTALS; MULTICHARGED IONS; NITROGEN IONS; PLATINUM; SCATTERING; SURFACES

Citation Formats

Robin, A, Universitaet Osnabrueck, D-49069 Osnabrueck, Niemann, D, Stolterfoht, N, and Heiland, W. Highly charged ions impinging on a stepped metal surface under grazing incidence. United States: N. p., 2003. Web. doi:10.1103/PhysRevA.67.052901.
Robin, A, Universitaet Osnabrueck, D-49069 Osnabrueck, Niemann, D, Stolterfoht, N, & Heiland, W. Highly charged ions impinging on a stepped metal surface under grazing incidence. United States. https://doi.org/10.1103/PhysRevA.67.052901
Robin, A, Universitaet Osnabrueck, D-49069 Osnabrueck, Niemann, D, Stolterfoht, N, and Heiland, W. 2003. "Highly charged ions impinging on a stepped metal surface under grazing incidence". United States. https://doi.org/10.1103/PhysRevA.67.052901.
@article{osti_20636389,
title = {Highly charged ions impinging on a stepped metal surface under grazing incidence},
author = {Robin, A and Universitaet Osnabrueck, D-49069 Osnabrueck and Niemann, D and Stolterfoht, N and Heiland, W},
abstractNote = {We report on energy loss measurements and charge state distributions for 60 keV N{sup 6+} and 75 keV N{sup 5+} ions scattered off a Pt(110)(1x2) single crystal surface. In particular, the influence of surface steps on the energy loss and the outgoing charge states is discussed. The scattering angle and the angle of incidence are varied. We use grazing incidence conditions, i.e., the momentum perpendicular to the surface is low enough to prevent penetration through the first atomic layer. Image charge effects are observed leading to an additional projectile acceleration towards the surface. Outgoing charge states are detected from 1+ up to 3+. Axial channeling conditions are defined by scattering along the azimuthal [001] direction, i.e., the projectiles are guided along the [001]-atomic rows. The energy loss for axial channeling is found to be somewhat larger and the energy distribution to be broadened in comparison with the spectra for planar channeling conditions. The broadening is attributed to the interaction of the projectiles with the side wall potentials of the surface channels. We find a strong increase in the energy loss with increasing scattering angle, which exceeds the calculated contribution of the elastic energy transfer by orders of magnitudes. These increased energy losses are attributed to the interaction of the ions with the surface steps.},
doi = {10.1103/PhysRevA.67.052901},
url = {https://www.osti.gov/biblio/20636389}, journal = {Physical Review. A},
issn = {1050-2947},
number = 5,
volume = 67,
place = {United States},
year = {Thu May 01 00:00:00 EDT 2003},
month = {Thu May 01 00:00:00 EDT 2003}
}