中国物理B ›› 2014, Vol. 23 ›› Issue (5): 53402-053402.doi: 10.1088/1674-1056/23/5/053402

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Electron impact ionization of neon and neonic ions under distorted-wave Born approximation

周丽霞, 燕友果   

  1. College of Science, China University of Petroleum, Qingdao 266580, China
  • 收稿日期:2013-06-28 修回日期:2013-10-23 出版日期:2014-05-15 发布日期:2014-05-15
  • 基金资助:
    Project supported by the Fundamental Research Funds for the Central University of China (Grant No. 13CX02019A).

Electron impact ionization of neon and neonic ions under distorted-wave Born approximation

Zhou Li-Xia (周丽霞), Yan You-Guo (燕友果)   

  1. College of Science, China University of Petroleum, Qingdao 266580, China
  • Received:2013-06-28 Revised:2013-10-23 Online:2014-05-15 Published:2014-05-15
  • Contact: Zhou Li-Xia E-mail:zhoulx@upc.edu.cn
  • About author:34.80.Dp; 34.50.Fa
  • Supported by:
    Project supported by the Fundamental Research Funds for the Central University of China (Grant No. 13CX02019A).

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摘要： The (e, 2e) triple differential cross sections of 2s orbitals of neon and neonic ions (Z=11-14) are calculated using a distorted-wave Born approximation under coplanar asymmetric geometry. The calculated results show that, with the increase in the nuclear charge number Z, the amplitude of triple differential cross sections decreases. The angle difference between the binary peak position and the direction of momentum transfer gradually increases with the increase in the nuclear charge Z, and a new structure appears at an ejected angle 90°<θ 2<120°. Three kinds of collision processes are proposed to illustrate the formation mechanism of such collision peaks.

关键词: (e,2e) reaction, distorted-wave Born approximation, triple differential cross sections

Abstract: The (e, 2e) triple differential cross sections of 2s orbitals of neon and neonic ions (Z=11-14) are calculated using a distorted-wave Born approximation under coplanar asymmetric geometry. The calculated results show that, with the increase in the nuclear charge number Z, the amplitude of triple differential cross sections decreases. The angle difference between the binary peak position and the direction of momentum transfer gradually increases with the increase in the nuclear charge Z, and a new structure appears at an ejected angle 90°<θ 2<120°. Three kinds of collision processes are proposed to illustrate the formation mechanism of such collision peaks.

Key words: (e,2e) reaction, distorted-wave Born approximation, triple differential cross sections

中图分类号:  (Atomic excitation and ionization)

  • 34.80.Dp
34.50.Fa (Electronic excitation and ionization of atoms (including beam-foil excitation and ionization))