INVESTIGADORES
OTRANTO Sebastian
artículos
Título:
Double ionization of He by ion impact: second order contributions to the fully differential cross sections
Autor/es:
S. D. LÓPEZ; S. OTRANTO; C. R. GARIBOTTI
Revista:
PHYSICAL REVIEW A - ATOMIC, MOLECULAR AND OPTICAL PHYSICS
Editorial:
AMER PHYSICAL SOC
Referencias:
Lugar: New York; Año: 2014 vol. 89 p. 627091 - 6270911
ISSN:
1050-2947
Resumen:
In this work, we present a second-order Born series treatment for the
double ionization of He by ion impact. In particular, we show that the
well-known independent events and independent electron models naturally
result from an on-shell treatment for the second-order Born
approximation. A transition amplitude which coherently includes first-
and second-order terms in the projectile interaction is introduced to
study the role of the two-step-1, shake-off, and two-step-2 mechanisms
at different impact energies. Fully differential cross sections for
proton and antiproton impact are presented and analyzed for different
projectile momentum transfers.