Title

Two-Particle versus Three-Particle Interactions in Single Ionization of Helium by Ion Impact

Abstract

We have performed kinematically complete experiments on single ionization of He by 100 MeV amu-1 C6+ and 3.6 MeV amu-1 Au24,53+ impact. By analysing doubly differential cross sections (DDCS) as a function of the momenta of all two-particle sub-systems we studied the importance of two-particle interactions. Furthermore, presenting the squared momenta of all three collision fragments simultaneously in a Dalitz plot, we evaluated the role of three-particle interactions. Finally, both for the DDCS and the Dalitz plots the corresponding correlation function was analysed. While the absolute cross sections confirm that ionization predominantly leads to a momentum exchange between the electron and the recoil-ion, the correlation function reveals strong correlations between the particles of any two-particle sub-system. Three-particle correlations, which are not accounted for by perturbative calculations, are quite significant as well, at least for certain kinematic conditions.

Department(s)

Physics

Sponsor(s)

Gesellschaft fur Schwerionenforschung
German Research Association. Leibniz-Programm
Mercator Programme
National Science Foundation (U.S.)

Keywords and Phrases

Approximation theory; Boundary conditions; Continuum mechanics; Couplings; Data reduction; Hamiltonians; Ionization; Perturbation techniques; Collision fragments; Cross sections; Kinematic conditions; Particle interactions; Helium

International Standard Serial Number (ISSN)

0953-4075

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2004 Institute of Physics - IOP Publishing, All rights reserved.

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