Regular Article – Atomic and Molecular Collisions
Electron emissions from molecules in collisions with 94 MeV ions
Department of Nuclear and Atomic Physics, Tata Institute of Fundamental Research, 400005, Mumbai, India
2 Institute for Nuclear Research (ATOMKI), H-4001, Debrecen, Hungary
Accepted: 14 November 2022
Published online: 14 December 2022
We have studied the electron emissions from the smallest hydrocarbon molecule, , in collisions with 94 MeV -ions. The absolute double differential cross sections (DDCS) of electron emissions are measured in the energy range of 3–400 eV and in the angular range 20 to 160 The measured data have been compared with the continuum distorted wave-eikonal initial state (CDW-EIS) model. The CDW-EIS calculations performed with the complete neglect of differential overlap (CNDO) and the molecular orbital (MO) description of the target are presented. Calculations using both target descriptions show a reasonably good agreement with the measured data. However, the CDW-EIS (MO) shows better agreement with the measured cross sections as compared to the CDW-EIS (CNDO). The single differential cross section, total cross sections have also been deduced from the measured DDCS. The KLL Auger hypersatellite peak due to the double K-vacancy in C-atom has been observed. The ratio of double-to-single K-vacancy production cross section is found to be substantially large, i.e., 33%. The present data, obtained by using such highly charged ions, provides crucial input to the applicability of this MO-based CDW-EIS model for such collisions.
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