Internuclear interaction on fully differential cross-sections for single ionization of helium by proton impact
Center for Molecules Research, School of Physics and Information Engineering, Shanxi Normal University Linfen, Shanxi 041004, PRC
Received: 20 January 2015
Accepted: 22 March 2015
The modified Coulomb-Born approximation including the proton impact internuclear interaction (MCB-PI) is applied to study single ionization of helium by 75 keV proton impact. Fully differential cross-sections (FDCS) are calculated both in the scattering and perpendicular planes. The results are compared with experimental data and theoretical predictions from the three-body distorted wave (3DW) and the continuum distorted wave-eikonal initial state (CDW-EIS). It is shown that the features of the FDCS are better reproduced by the MCB-PI results. We also assess the influence of the PI interaction on the FDCS and we find that the PI interaction is particularly important in the perpendicular plane.
PACS: 34.80.Dp – Atomic excitation and ionization / 34.50.-s – Scattering of atoms and molecules
© EPLA, 2015