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

Angle- 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 tha...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Ríos Rubiano, C.A., Bocan, G.A., Juaristi, J.I., Gravielle, M.S.
Formato: JOUR
Materias:
Energy loss
Grazing incidence
Metal surface
Friction
Silver
Surface scattering
Crystallographic directions
Dissipative effects
Energy loss distributions
Energy-loss spectrum
Metal surfaces
Multiple peak structures
Projectile distributions
Energy dissipation
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_0168583X_v340_n_p15_RiosRubiano
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
Descripción
Sumario:Angle- 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. © 2014 Elsevier B.V. All rights reserved.

Ejemplares similares