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Abstract:

In this work we evaluate the production of excitons of a lithium fluoride crystal induced by proton impact in the intermediate and high energy regime (from 100 keV to 1 MeV). A simple model is proposed to account for the influence of the Coulomb grid of the target by dressing crystal ions to transform them in what we call onions. The excited states of these onions can be interpreted as excitons. Within this model, total cross section and stopping power are calculated by using the first Born and the continuum distorted-wave (CDW) eikonal initial-state (EIS) approximations. We found that between 7 and 30 excitons per incident proton are produced in grazing collisions with LiF surfaces, becoming a relevant mechanism of inelastic transitions. © 2011 American Physical Society.

Registro:

Documento: Artículo
Título:Production of excitons in grazing collisions of protons with LiF surfaces: An onion model
Autor:Miraglia, J.E.; Gravielle, M.S.
Filiación:Instituto de Astronomía y Física del Espacio, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Casilla de Correo 67, Sucursal 28, C1428EGA Buenos Aires, Argentina
Palabras clave:Crystal ions; Distorted waves; Eikonal; Inelastic transitions; Intermediate and high energies; Lithium fluoride crystals; Proton impact; Stopping power; Total cross section; Lithium; Protons; Excitons
Año:2011
Volumen:84
Número:6
DOI: http://dx.doi.org/10.1103/PhysRevA.84.062901
Título revista:Physical Review A - Atomic, Molecular, and Optical Physics
Título revista abreviado:Phys Rev A
ISSN:10502947
CODEN:PLRAA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_10502947_v84_n6_p_Miraglia

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Citas:

---------- APA ----------
Miraglia, J.E. & Gravielle, M.S. (2011) . Production of excitons in grazing collisions of protons with LiF surfaces: An onion model. Physical Review A - Atomic, Molecular, and Optical Physics, 84(6).
http://dx.doi.org/10.1103/PhysRevA.84.062901
---------- CHICAGO ----------
Miraglia, J.E., Gravielle, M.S. "Production of excitons in grazing collisions of protons with LiF surfaces: An onion model" . Physical Review A - Atomic, Molecular, and Optical Physics 84, no. 6 (2011).
http://dx.doi.org/10.1103/PhysRevA.84.062901
---------- MLA ----------
Miraglia, J.E., Gravielle, M.S. "Production of excitons in grazing collisions of protons with LiF surfaces: An onion model" . Physical Review A - Atomic, Molecular, and Optical Physics, vol. 84, no. 6, 2011.
http://dx.doi.org/10.1103/PhysRevA.84.062901
---------- VANCOUVER ----------
Miraglia, J.E., Gravielle, M.S. Production of excitons in grazing collisions of protons with LiF surfaces: An onion model. Phys Rev A. 2011;84(6).
http://dx.doi.org/10.1103/PhysRevA.84.062901