Multiple electron emission from noble gases colliding with proton beams, including postcollisional effects
- Instituto de Fisica Rosario (CONICET-UNR) and Escuela de Ciencias Exactas y Naturales, Universidad Nacional de Rosario, Avenida Pellegrini 250, 2000 Rosario (Argentina)
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.
- OSTI ID:
- 20982526
- Journal Information:
- Physical Review. A, Vol. 75, Issue 5; Other Information: DOI: 10.1103/PhysRevA.75.052708; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
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