Effect of projected band gap on neutralization of Cs ions during grazing scattering from a Cu(111) surface
- Laboratoire des Collisions Atomiques et Moleculaires, Unite Mixte de Recherche CNRS--Universite Paris-Sud, UMR 8625, Batiment 351, 91405 Orsay Cedex, (France)
Cs ions with energies ranging from 10 keV to 1.8 MeV are scattered under a grazing angle of incidence from a flat and clean Cu(111) surface. The observed fractions of Cs atoms in the scattered beams and their dependence on projectile velocity are well described by a model of kinematically assisted resonant charge transfer between projectile and two-dimensional surface-state continuum of the target surface. A comparison with calculations for a target represented by the electronic structure of a free-electron metal shows neutral fractions which are enhanced for the Cu(111) by more than one order of magnitude. This is the strongest effect of the projected band gap of a metal surface on the charge transfer observed so far.
- OSTI ID:
- 20639923
- Journal Information:
- Physical Review. A, Vol. 68, Issue 1; Other Information: DOI: 10.1103/PhysRevA.68.012901; (c) 2003 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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