Classical Trajectory Monte Carlo simulation of coincidence experiments in electron impact ionization of helium⋆
Institute for Nuclear Research, Hungarian Academy of Sciences (Atomki), 4026 Debrecen Bem tér 18/c, Hungary
2 ELI-ALPS, ELI-HU Non-profit Ltd., Dugonics tér 13, 6720 Szeged, Hungary
3 Institute of Physics, University of Miskolc, 3515 Miskolc-Egyetemváros, Hungary
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Received in final form: 11 February 2019
Published online: 17 April 2019
The state-to-state (exchange) interference of the autoionizing resonances of helium is studied in (e,2e) experiments. These studies are disturbed by the coincidence events caused by the direct ionization, so their decrease is desirable. For this reason, to mimic the experimental observation, we performed four-body classical trajectory Monte Carlo calculations. The calculations were done for 93.15 eV primary energy, where the exchange interference of the 2s2(1S) and 2p2(1D) autoionizing states of helium is expected. The yields of non-coincidence and coincidence events detected in various combinations of scattering geometry were calculated and compared with the experimental observations.
Key words: Topical issue
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