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Title: Velocity dependence of outgoing neutral fractions for H(1s) and H{sup +} beams impinging on Al(111) at grazing incidence

Abstract

Neutral fractions of scattered ground-state hydrogen atoms after grazing incidence collisions of both H(1s) and H{sup +} projectiles with an Al(111) surface have been computed within the impact velocity range 0.1{<=}v{<=}2.0 a.u. by means of the etisc1d code. Comparison between the results related to the H(1s) beam with those obtained for H{sup +} projectiles - which we found in earlier work to be in good agreement with experimental data - shows that in the velocity range 0.3{<=}v{<=}1.3 a.u. neutral fractions keep the memory of the initial state, whereas in the extreme ranges of low velocities (v < or approx. 0.3 a.u.) and high velocities (v > or approx. 1.3 a.u.), the outgoing charge fractions do not depend on the charge state of the initial beam. In order to analyze qualitatively these findings, rate-equations calculations as well as a simplified analytical model have been also implemented. Due to the lack of experimental data for impinging H(1s), the present results represent important theoretical predictions which might stimulate further experimental works.

Authors:
 [1];  [2]
  1. CELIA (UMR 5107 Universite Bordeaux 1-CNRS-CEA), Universite Bordeaux 1, 351 Cours de la Liberation, F-33405 Talence Cedex (France)
  2. Departamento de Fisica, Universidad de Concepcion Casilla 160-C, Concepcion (Chile)
Publication Date:
OSTI Identifier:
22058804
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 1; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ALUMINIUM; ATOMS; CHARGE STATES; COLLISIONS; GROUND STATES; HYDROGEN 1; HYDROGEN IONS 1 PLUS; PROJECTILES; REACTION KINETICS

Citation Formats

Jouin, H., and Gutierrez, F. A. Velocity dependence of outgoing neutral fractions for H(1s) and H{sup +} beams impinging on Al(111) at grazing incidence. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.014901.
Jouin, H., & Gutierrez, F. A. Velocity dependence of outgoing neutral fractions for H(1s) and H{sup +} beams impinging on Al(111) at grazing incidence. United States. doi:10.1103/PHYSREVA.84.014901.
Jouin, H., and Gutierrez, F. A. Fri . "Velocity dependence of outgoing neutral fractions for H(1s) and H{sup +} beams impinging on Al(111) at grazing incidence". United States. doi:10.1103/PHYSREVA.84.014901.
@article{osti_22058804,
title = {Velocity dependence of outgoing neutral fractions for H(1s) and H{sup +} beams impinging on Al(111) at grazing incidence},
author = {Jouin, H. and Gutierrez, F. A.},
abstractNote = {Neutral fractions of scattered ground-state hydrogen atoms after grazing incidence collisions of both H(1s) and H{sup +} projectiles with an Al(111) surface have been computed within the impact velocity range 0.1{<=}v{<=}2.0 a.u. by means of the etisc1d code. Comparison between the results related to the H(1s) beam with those obtained for H{sup +} projectiles - which we found in earlier work to be in good agreement with experimental data - shows that in the velocity range 0.3{<=}v{<=}1.3 a.u. neutral fractions keep the memory of the initial state, whereas in the extreme ranges of low velocities (v < or approx. 0.3 a.u.) and high velocities (v > or approx. 1.3 a.u.), the outgoing charge fractions do not depend on the charge state of the initial beam. In order to analyze qualitatively these findings, rate-equations calculations as well as a simplified analytical model have been also implemented. Due to the lack of experimental data for impinging H(1s), the present results represent important theoretical predictions which might stimulate further experimental works.},
doi = {10.1103/PHYSREVA.84.014901},
journal = {Physical Review. A},
issn = {1050-2947},
number = 1,
volume = 84,
place = {United States},
year = {2011},
month = {7}
}