中国物理B ›› 2012, Vol. 21 ›› Issue (8): 83401-083401.doi: 10.1088/1674-1056/21/8/083401

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Study of (e, 2e) process on potassium at 6 eV–60 eV above threshold in second-order Born approximation

王旸, 周雅君, 焦利光   

  1. Center for Theoretical Atomic and Molecular Physics, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, China
  • 收稿日期:2012-04-03 修回日期:2012-05-05 出版日期:2012-07-01 发布日期:2012-07-01
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11174066).

Study of (e, 2e) process on potassium at 6 eV–60 eV above threshold in second-order Born approximation

Wang Yang (王旸), Zhou Ya-Jun (周雅君), Jiao Li-Guang (焦利光 )   

  1. Center for Theoretical Atomic and Molecular Physics, Academy of Fundamental and Interdisciplinary Sciences, Harbin Institute of Technology, Harbin 150080, China
  • Received:2012-04-03 Revised:2012-05-05 Online:2012-07-01 Published:2012-07-01
  • Contact: Zhou Ya-Jun E-mail:yajunzhou2003@yahoo.com.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11174066).

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摘要： The standard distorted wave Born approximation (DWBA) method has been extended to second-order Born amplitude in order to describe the multiple interactions between the projectile and the atomic target. Second-order DWBA calculations have been preformed to investigate the triple differential cross sections (TDCS) of coplanar doubly symmetric (e, 2e) collisions for alkali target potassium at excess energies of 6 eV-60 eV. Comparing with the first-order DWBA calculations before, the present theoretical model improves the degree of agreement with experiments, especially for backward scattering angle region of TDCS. This indicates that the present second-order Born term is capable to give a reasonable correction to DWBA model in studying coplanar symmetric (e, 2e) problems in low and intermediate energy range.

关键词: second-order Born approximation, (e, 2e) collisions, potassium, triple differential cross section

Abstract: The standard distorted wave Born approximation (DWBA) method has been extended to second-order Born amplitude in order to describe the multiple interactions between the projectile and the atomic target. Second-order DWBA calculations have been preformed to investigate the triple differential cross sections (TDCS) of coplanar doubly symmetric (e, 2e) collisions for alkali target potassium at excess energies of 6 eV-60 eV. Comparing with the first-order DWBA calculations before, the present theoretical model improves the degree of agreement with experiments, especially for backward scattering angle region of TDCS. This indicates that the present second-order Born term is capable to give a reasonable correction to DWBA model in studying coplanar symmetric (e, 2e) problems in low and intermediate energy range.

Key words: second-order Born approximation, (e, 2e) collisions, potassium, triple differential cross section

中图分类号:  (Atomic excitation and ionization)

  • 34.80.Dp