Post-Collisional Effects on Single Ionization in 75 KeV P+He Collisions
We report fully differential cross-section calculations using distorted wave theories for helium single ionization by 75 keV p impact. Comparisons are made with absolute experimental data and we find that good results are obtained in the magnitude without the need for normalization factors. However, discrepancies are quite apparent in the position and shape of the peak structures in the fully differential angular distribution of the ejected electrons. We assess the influence of the internuclear interaction on low-energy electron emission in the scattering plane and in the perpendicular plane. Our continuum distorted wave-eikonal initial state calculations with (without) the internuclear interaction yield better results for the large (small) momentum transfer. We discuss this behaviour as a consequence of active electron screening for low-energy electron emission.
M. F. Ciappina et al., "Post-Collisional Effects on Single Ionization in 75 KeV P+He Collisions," Journal of Physics B: Atomic, Molecular and Optical Physics, Institute of Physics - IOP Publishing, Jan 2007.
The definitive version is available at http://dx.doi.org/10.1088/0953-4075/40/13/004
National Agency for the Promotion of Science and Technology (Argentina)
National Council of Scientific and Technical Investigations (Argentina)
National Science Foundation (U.S.)
Universidad Nacional del Sur
Keywords and Phrases
Cross-Section Calculations; Distorted Wave Theories; Helium Single Ionization
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