Two-Particle versus Three-Particle Interactions in Single Ionization of Helium by Ion Impact
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.
M. Schulz et al., "Two-Particle versus Three-Particle Interactions in Single Ionization of Helium by Ion Impact," Journal of Physics B, vol. 37, no. 20, pp. 4055-4067, Institute of Physics - IOP Publishing, Oct 2004.
The definitive version is available at http://dx.doi.org/10.1088/0953-4075/37/20/002
Gesellschaft fur Schwerionenforschung
German Research Association. Leibniz-Programm
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)
Article - Journal
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