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.
CITATION STYLE
Schulz, M., Moshammer, R., Fischer, D., & Ullrich, J. (2004). Two-particle versus three-particle interactions in single ionization of helium by ion impact. Journal of Physics B: Atomic, Molecular and Optical Physics, 37(20), 4055–4067. https://doi.org/10.1088/0953-4075/37/20/002
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