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Artículo

Acceleration and deceleration of convoy electrons in grazing-ion-surface collisions.

Gravielle, Maria SilviaIcon ; Miraglia, Jorge EstebanIcon
Fecha de publicación: 12/2003
Editorial: American Physical Society
Revista: Physical Review A: Atomic, Molecular and Optical Physics
ISSN: 1050-2947
Idioma: Inglés
Tipo de recurso: Artículo publicado
Clasificación temática:
Otras Ciencias Físicas

Resumen

Convoy-electron emission produced by grazing-ion–surface scattering is studied in the framework of the distorted-wave theory. We develop a model, here named field distorted-wave (FDW) approximation, to describe the effect of the surface interaction on the electronic transition. In the model, the action of the surface field on the ejected electron is seen as an additional momentum transfer that depends on the projectile position. We apply the FDW approximation to analyze electron distributions for 100 keV protons impinging on LiF(100) and Al(111) surfaces, which are insulator and metal materials, respectively. In the case of metals, the dynamic screening of the projectile is included in the Jost function corresponding to the final state. As experimentally observed, energy spectra of forward-ejected electrons display a prominent structure associated with the convoy-electron emission. We find that the maximum of the convoy-electron distribution is decelerated for LiF and accelerated for Al, with respect to its position in ion-atom collisions, in quantitative agreement with the experimental data.
Palabras clave: Electron Emission , Convoy Peak , Grazing , Surface
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info:eu-repo/semantics/openAccess Excepto donde se diga explícitamente, este item se publica bajo la siguiente descripción: Creative Commons Attribution-NonCommercial-ShareAlike 2.5 Unported (CC BY-NC-SA 2.5)
Identificadores
URI: http://hdl.handle.net/11336/22188
DOI: http://dx.doi.org/10.1103/PhysRevA.67.042901
URL: https://journals.aps.org/pra/abstract/10.1103/PhysRevA.67.042901
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Articulos(IAFE)
Articulos de INST.DE ASTRONOMIA Y FISICA DEL ESPACIO(I)
Citación
Gravielle, Maria Silvia; Miraglia, Jorge Esteban; Acceleration and deceleration of convoy electrons in grazing-ion-surface collisions.; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 67; 042901; 12-2003; 1-9
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