EXCHANGE EFFECTS AND COLLISION MECHANISMS IN (e, 2e) PROCESSES |
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Authors: | Chen Zhang-jin Ni Zhi-xiang Shi Qi-cun and Xu Ke-zun |
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Abstract: | In this work the triple differential cross sections for electron impact ionization of helium at an incident energy of 64.6 eV is considered in the coplanar symmetric energy-sharing and fixed relative angles of the two out-going electrons kinematics. A new collision process called triple-binary collision is identified. It has been shown that the ordinary double-binary collision process is excluded from the collision kinematics considered here. It has also been shown how the exchange effects symmetrically contribute to the peaks in the cross sections. |
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