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Trajectory-dependent energy loss for swift He atoms axially scattered off a silver surface

AutorRíos Rubiano, C. A.; Bocan, Gisela A.; Juaristi, J. I.; Gravielle, M. S.
Palabras claveMetal surface
Grazing incidence
Energy loss
Fecha de publicación2014
CitaciónNuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 340: 15-20 (2014)
ResumenAngle- and energy-loss-resolved distributions of helium atoms grazingly scattered from a Ag(110) surface along low indexed crystallographic directions are investigated considering impact energies in the few keV range. Final projectile distributions are evaluated within a semi-classical formalism that includes dissipative effects due to electron-hole excitations through a friction force. For mono-energetic beams impinging along the [11¯0],[11¯2] and [001] directions, the model predicts the presence of multiple peak structures in energy-loss spectra. Such structures provide detailed information about the trajectory-dependent energy loss. However, when the experimental dispersion of the incident beam is taken into account, these energy-loss peaks are completely washed out, giving rise to a smooth energy-loss distribution, in fairly good agreement with available experimental data.
Descripción20th International Workshop on Inelastic Ion-Surface Collisions (IISC-20).
Versión del editorhttp://dx.doi.org/10.1016/j.nimb.2014.07.032
Identificadoresdoi: 10.1016/j.nimb.2014.07.032
issn: 0168-583X
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