Acceleration correction to the binary-encounter Bethe model for the electron-impact ionization of molecules

被引:0
|
作者
Wang, Yuan-Cheng [1 ,2 ,3 ]
Visentin, Giorgio [2 ,3 ]
Jiao, Li Guang [2 ,3 ,4 ]
Fritzsche, Stephan [2 ,3 ,5 ]
机构
[1] Shenyang Normal Univ, Coll Phys Sci & Technol, Shenyang 110034, Peoples R China
[2] Helmholtz Inst Jena, D-07743 Jena, Germany
[3] GSI Helmholtzzentrum Schwerionenforsch GmbH, Darmstadt D-64291, Germany
[4] Jilin Univ, Coll Phys, Changchun 130012, Peoples R China
[5] Friedrich Schiller Univ Jena, Theoret Phys Inst, D-07743 Jena, Germany
基金
中国国家自然科学基金;
关键词
ABSOLUTE CROSS-SECTIONS; DISSOCIATIVE IONIZATION; THRESHOLD; CS2; ATTACHMENT; SO2; H2O; CO2;
D O I
10.1103/PhysRevA.109.022804
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We propose a generalized binary-encounter Bethe model (GBEB) based on corrected acceleration energies to predict the electron-impact ionization cross sections of molecules. The acceleration energy of the incident electron is inversely proportional to the molecular effective charge felt by the ejected electron. The symmetry of molecular orbitals is analyzed to determine the core and valence effective charges. We tested the GBEB model on several organic, inorganic, and atmospheric molecules with increasing complexity. The calculated total ionization cross sections are in better agreement with the experimental data than the predictions from the original BEB model. Another major advantage of the present model rests upon the convenience that it does not need any ad hoc correction used in previous BEB models.
引用
收藏
页数:9
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