info:eu-repo/semantics/article
Double ionization of He by ion impact: Second-order contributions to the fully differential cross section
Fecha
2014-06Registro en:
López, Sebastián David; Otranto, Sebastián; Garibotti, Carlos Roberto; Double ionization of He by ion impact: Second-order contributions to the fully differential cross section; American Physical Society; Physical Review A: Atomic, Molecular and Optical Physics; 89; 6; 6-2014; 62709-62709
1050-2947
CONICET Digital
CONICET
Autor
López, Sebastián David
Otranto, Sebastián
Garibotti, Carlos Roberto
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. © 2014 American Physical Society.