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Title: Multiple electron emission from noble gases colliding with proton beams, including postcollisional effects

Abstract

The process of multiple electron ionization of Ne and Ar noble gases produced by impact of proton beams is studied in the framework of the independent-electron model. The role played by different mechanisms is analyzed, including intershell Auger and intrashell Coster-Kronig electron emission, which follow the production of vacancies due to direct interaction of the projectile with the target electrons. The present results, obtained with the continuum distorted wave-eikonal initial state (CDW-EIS) approximation, confirm previous predictions given by a different theoretical model. Semiempirical approximations are introduced by using analytical single-ionization probabilities with adjustable parameters determined from CDW-EIS total cross sections. The small computational time required to calculate multiple ionization cross sections with these semiempirical approximations and the good agreement found with existing experimental data and with results obtained with more elaborated theoretical models make them good candidates to study electron emission from complex targets.

Authors:
; ;  [1];  [2]
  1. Instituto de Fisica Rosario (CONICET-UNR) and Escuela de Ciencias Exactas y Naturales, Universidad Nacional de Rosario, Avenida Pellegrini 250, 2000 Rosario (Argentina)
  2. (Argentina)
Publication Date:
OSTI Identifier:
20982526
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. A; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevA.75.052708; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; ARGON; AUGER EFFECT; CATIONS; COSTER-KRONIG TRANSITIONS; DISTORTED WAVE THEORY; EIKONAL APPROXIMATION; ELECTRON EMISSION; ENERGY-LEVEL TRANSITIONS; FORECASTING; HYDROGEN IONS; INTERACTIONS; ION-ATOM COLLISIONS; IONIZATION; NEON; PROBABILITY; PROTON BEAMS; RARE GASES; TOTAL CROSS SECTIONS; VACANCIES

Citation Formats

Galassi, M. E., Rivarola, R. D., Fainstein, P. D., and Centro Atomico Bariloche, Comision Nacional de Energia Atomica, 8400 Bariloche, Rio Negro. Multiple electron emission from noble gases colliding with proton beams, including postcollisional effects. United States: N. p., 2007. Web. doi:10.1103/PHYSREVA.75.052708.
Galassi, M. E., Rivarola, R. D., Fainstein, P. D., & Centro Atomico Bariloche, Comision Nacional de Energia Atomica, 8400 Bariloche, Rio Negro. Multiple electron emission from noble gases colliding with proton beams, including postcollisional effects. United States. doi:10.1103/PHYSREVA.75.052708.
Galassi, M. E., Rivarola, R. D., Fainstein, P. D., and Centro Atomico Bariloche, Comision Nacional de Energia Atomica, 8400 Bariloche, Rio Negro. Tue . "Multiple electron emission from noble gases colliding with proton beams, including postcollisional effects". United States. doi:10.1103/PHYSREVA.75.052708.
@article{osti_20982526,
title = {Multiple electron emission from noble gases colliding with proton beams, including postcollisional effects},
author = {Galassi, M. E. and Rivarola, R. D. and Fainstein, P. D. and Centro Atomico Bariloche, Comision Nacional de Energia Atomica, 8400 Bariloche, Rio Negro},
abstractNote = {The process of multiple electron ionization of Ne and Ar noble gases produced by impact of proton beams is studied in the framework of the independent-electron model. The role played by different mechanisms is analyzed, including intershell Auger and intrashell Coster-Kronig electron emission, which follow the production of vacancies due to direct interaction of the projectile with the target electrons. The present results, obtained with the continuum distorted wave-eikonal initial state (CDW-EIS) approximation, confirm previous predictions given by a different theoretical model. Semiempirical approximations are introduced by using analytical single-ionization probabilities with adjustable parameters determined from CDW-EIS total cross sections. The small computational time required to calculate multiple ionization cross sections with these semiempirical approximations and the good agreement found with existing experimental data and with results obtained with more elaborated theoretical models make them good candidates to study electron emission from complex targets.},
doi = {10.1103/PHYSREVA.75.052708},
journal = {Physical Review. A},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}