Theoretical description of two- and three-particle interactions in single ionization of helium by ion impact

M. F. Ciappina*, W. R. Cravero, M. Schulz, R. Moshammer, J. Ullrich

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

In this work we calculate doubly differential cross sections (DDCS) for single ionization of helium by highly charged ion impact. We study the importance of two-particle interactions in these processes by considering the cross sections as a function of all two-particle subsystems momenta. Experimental DDCSs were obtained recently from kinematically complete experiments on single ionization of He by 100 MeV amu C6+ and 3.6 MeV amu Au24,53+ impact. Furthermore, we evaluated the importance of three-particle interactions by plotting the squared momenta of all three collision fragments simultaneously in a Dalitz plot. Using the first Born and distorted-wave approximations for fully differential cross sections, together with Monte Carlo integration techniques, we were able to reproduce the main features observed in experimental data and to assess the quality of the models implied by the different employed approximations.

Original languageEnglish
Article number042702
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume74
Issue number4
DOIs
StatePublished - 2006

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