中国物理B ›› 1998, Vol. 7 ›› Issue (7): 481-487.doi: 10.1088/1004-423X/7/7/001

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EXCHANGE EFFECTS AND COLLISION MECHANISMS IN (e, 2e) PROCESSES

施启存1, 徐克尊1, 陈长进2, 倪致祥3   

  1. (1)Department of Modern Physics, University of Science and Technology of China, Hefei 230027, China; (2)Department of Physics, Anhui University, Hefei 230039, China; Department of Modern Physics, University of Science and Technology of China, Hefei 230027, China; (3)Department of Physics, Fuyang Teacher's College, Fuyang 236032,China
  • 收稿日期:1997-11-21 修回日期:1998-01-19 出版日期:1998-07-20 发布日期:1998-07-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China, the National Education Foundation of China and by the Education Foundation of Anhui province, China.

EXCHANGE EFFECTS AND COLLISION MECHANISMS IN (e, 2e) PROCESSES

Chen Zhang-jin (陈长进)ab, Ni Zhi-xiang (倪致祥)c, Shi Qi-cun (施启存)b, Xu Ke-zun (徐克尊)b   

  1. a Department of Physics, Anhui University, Hefei 230039, China; b Department of Modern Physics, University of Science and Technology of China, Hefei 230027, China; c Department of Physics, Fuyang Teacher's College, Fuyang 236032,China
  • Received:1997-11-21 Revised:1998-01-19 Online:1998-07-20 Published:1998-07-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China, the National Education Foundation of China and by the Education Foundation of Anhui province, China.

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摘要： 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.

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.

中图分类号:  (Atomic excitation and ionization)

  • 34.80.Dp
34.10.+x (General theories and models of atomic and molecular collisions and interactions (including statistical theories, transition state, stochastic and trajectory models, etc.))