INVESTIGADORES
RIVAROLA Roberto Daniel
artículos
Título:
Multiple electron emission from noble gases colliding with proton beams, including postcollisional effects
Autor/es:
M E GALASSI, R D RIVAROLA Y P D FAINSTEIN
Revista:
PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS
Editorial:
American Physical Society
Referencias:
Lugar: New York; Año: 2007 vol. 75 p. 527081 - 527086
ISSN:
1050-2947
Resumen:
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 waveeikonal 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. 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.