Post-collisional effects on single ionization in 75 keV p + He collisions

M. F. Ciappina*, W. R. Cravero, M. Schulz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


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.

Original languageEnglish
Article number004
Pages (from-to)2577-2586
Number of pages10
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Issue number13
StatePublished - 14 Jul 2007
Externally publishedYes


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