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.




National Agency for the Promotion of Science and Technology (Argentina)
Universidad Nacional del Sur

Keywords and Phrases

Doubly Differential Cross Sections; Ion bombardment

Document Type

Article - Journal

Document Version

Final Version

File Type





© 2006 American Physical Society (APS), All rights reserved.

Publication Date

01 Jan 2006

Included in

Physics Commons