Theoretical analysis on fully differential cross sections for C6+ impact ionization of helium

doi:10.1088/1674-1056/23/6/063404

中国物理B ›› 2014, Vol. 23 ›› Issue (6): 63404-063404.doi: 10.1088/1674-1056/23/6/063404

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Theoretical analysis on fully differential cross sections for C⁶⁺ impact ionization of helium

方小英, 张瑞芳, 段慧晓, 孙世艳, 贾祥富

Center for Molecules Research, School of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China

收稿日期:2013-11-19 修回日期:2013-12-19 出版日期:2014-06-15 发布日期:2014-06-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 11274215), the Natural Science Foundation of Shanxi Province, China (Grants Nos. 20051008 and 2010011009), and the Technology Project of Shanxi Provincial Education Department, China (Grant No. 20111011).

Theoretical analysis on fully differential cross sections for C⁶⁺ impact ionization of helium

Fang Xiao-Ying (方小英), Zhang Rui-Fang (张瑞芳), Duan Hui-Xiao (段慧晓), Sun Shi-Yan (孙世艳), Jia Xiang-Fu (贾祥富)

Center for Molecules Research, School of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China

Received:2013-11-19 Revised:2013-12-19 Online:2014-06-15 Published:2014-06-15
Contact: Jia Xiang-Fu E-mail:jiaxf@dns.sxnu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 11274215), the Natural Science Foundation of Shanxi Province, China (Grants Nos. 20051008 and 2010011009), and the Technology Project of Shanxi Provincial Education Department, China (Grant No. 20111011).

摘要/Abstract

摘要： Fully differential cross sections (FDCS) are calculated within a four-body model for single ionization of helium by C⁶⁺ impact at the incident energy of 100 MeV/a.u. (atomic unit). The results are compared with experimental data and other theoretical predictions. It is shown that our results are in very good agreement with experiment for three small momentum transfers in the scattering plane; however, some significant discrepancies are still present at the largest momentum transfer in both the scattering plane and the perpendicular plane. In actuality, the problem has not been explained by the theory during the last decade. Accordingly, the contributions of different scattering amplitudes to FDCS are analyzed. It is found that for the largest momentum transfer the cross section arising from a destructive interference of the three amplitudes is much smaller than the experimental data. However, the cross section due to the constructive interference of two scattering amplitudes between projectile-ionized electron interaction and projectile-passive electron interaction almost approaches the experimental data.

关键词: ion-impact ionization, fully differential cross section, four-body model, interference effect

Abstract: Fully differential cross sections (FDCS) are calculated within a four-body model for single ionization of helium by C⁶⁺ impact at the incident energy of 100 MeV/a.u. (atomic unit). The results are compared with experimental data and other theoretical predictions. It is shown that our results are in very good agreement with experiment for three small momentum transfers in the scattering plane; however, some significant discrepancies are still present at the largest momentum transfer in both the scattering plane and the perpendicular plane. In actuality, the problem has not been explained by the theory during the last decade. Accordingly, the contributions of different scattering amplitudes to FDCS are analyzed. It is found that for the largest momentum transfer the cross section arising from a destructive interference of the three amplitudes is much smaller than the experimental data. However, the cross section due to the constructive interference of two scattering amplitudes between projectile-ionized electron interaction and projectile-passive electron interaction almost approaches the experimental data.

Key words: ion-impact ionization, fully differential cross section, four-body model, interference effect

中图分类号: (Atomic excitation and ionization)

34.80.Dp

34.50.-s (Scattering of atoms and molecules)

方小英, 张瑞芳, 段慧晓, 孙世艳, 贾祥富. Theoretical analysis on fully differential cross sections for C⁶⁺ impact ionization of helium[J]. 中国物理B, 2014, 23(6): 63404-063404.

Fang Xiao-Ying (方小英), Zhang Rui-Fang (张瑞芳), Duan Hui-Xiao (段慧晓), Sun Shi-Yan (孙世艳), Jia Xiang-Fu (贾祥富). Theoretical analysis on fully differential cross sections for C⁶⁺ impact ionization of helium[J]. Chin. Phys. B, 2014, 23(6): 63404-063404.

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Theoretical analysis on fully differential cross sections for C⁶⁺ impact ionization of helium

Theoretical analysis on fully differential cross sections for C⁶⁺ impact ionization of helium

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