ELECTRON IMPACT IONIZATION OF HELIUM FROM ITS GROUND AND METASTABLE STATES

doi:10.1088/1004-423X/8/5/003

Abstract

Abstract The triple differential cross sections for the ionization of helium from its ground state 1¹S and metastable states 2¹S and 2³S in coplanar asymmetric geometry by 150, 250 and 400 eV electrons have been calculated in the BBK model. The present results are compared with the experimental data and/or the other theoretical ones. It has been found that the structures for the metastable states differ markedly from those for the ground state. The collision mechanisms for the new structures appearing in the cross sections for the ionization from metastable states have been analysed. And it has been shown how the intensity of recoil peak changes due to the size of the electron orbital. In addition, the optimal kinematical situations for the cross sections are explored for future experiment.

Received: 09 November 1998
Accepted manuscript online:

PACS:

34.80.Dp

(Atomic excitation and ionization)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 19634040) and by the Education Foundation of Anhui Province (Grant No. 97JL101), China.

Cite this article:

Chen Zhang-jin (陈长进), Xu Ke-zun (徐克尊) ELECTRON IMPACT IONIZATION OF HELIUM FROM ITS GROUND AND METASTABLE STATES 1999 Acta Physica Sinica (Overseas Edition) 8 331

[1]	Electron excitation processes in low energy collisions of hydrogen-helium atoms Kun Wang(王堃), Chuan Dong(董川), Yi-Zhi Qu(屈一至), Ling Liu(刘玲), Yong Wu(吴勇),Xu-Hai Hong(洪许海), and Robert J. Buenker. Chin. Phys. B, 2022, 31(12): 123401.
[2]	Electron emission induced by keV protons from tungsten surface at different temperatures Li-Xia Zeng(曾利霞), Xian-Ming Zhou(周贤明), Rui Cheng(程锐), Yu Liu(柳钰), Xiao-An Zhang(张小安), and Zhong-Feng Xu(徐忠锋). Chin. Phys. B, 2022, 31(7): 073202.
[3]	Electron-impact ionization cross section calculations for lithium-like ions Guo-Jie Bian(卞国杰), Jyh-Ching Chang(张稚卿), Ke-Ning Huang(黄克宁), Chen-Sheng Wu(武晨晟), Yong-Jun Cheng(程勇军), Kai Wang(王凯), and Yong Wu(吴勇). Chin. Phys. B, 2022, 31(1): 013401.
[4]	X-ray emission for Ar¹¹⁺ ions impacting on various targets in the collisions near the Bohr velocity Xian-Ming Zhou(周贤明), Jing Wei(尉静), Rui Cheng(程锐), Yan-Hong Chen(陈燕红), Ce-Xiang Mei(梅策香), Li-Xia Zeng(曾利霞), Chang-Hui Liang(梁昌慧), Yao-Zong Li(李耀宗), Yong-Tao Zhao(赵永涛), and Xiao-An Zhang(张小安). Chin. Phys. B, 2021, 30(8): 083201.
[5]	Evidence of potential change in nonsequential double ionization Changchun Jia(贾昌春), Pu Zhang(张朴), Hua Wen(文华), and Zhangjin Chen(陈长进). Chin. Phys. B, 2021, 30(2): 023401.
[6]	Double differential cross sections for ionization of H by 75 keV proton impact: Assessing the role of correlated wave functions Jungang Fan(范军刚), Xiangyang Miao(苗向阳), and Xiangfu Jia(贾祥福). Chin. Phys. B, 2020, 29(12): 120301.
[7]	Quantitative rescattering theory for nonsequential double ionization Zhangjin Chen(陈长进), Fang Liu(刘芳), Hua Wen(文华). Chin. Phys. B, 2019, 28(12): 123401.
[8]	Relativistic electron scattering from freely movable proton/μ⁺ in the presence of strong laser field Ningyue Wang(王宁月), Liguang Jiao(焦利光), Aihua Liu(刘爱华). Chin. Phys. B, 2019, 28(9): 093402.
[9]	Interference effect of photoionization of hydrogen atoms by ultra-short and ultra-fast high-frequency chirped pulses Ningyue Wang(王宁月), Aihua Liu(刘爱华). Chin. Phys. B, 2019, 28(8): 083403.
[10]	Electron-impact single ionizaiton for W⁴⁺ and W⁵⁺ Denghong Zhang(张登红), Luyou Xie(颉录有), Jun Jiang(蒋军), Zhongwen Wu(武中文), Chenzhong Dong(董晨钟), Yinglong Shi(师应龙), Yizhi Qu(屈一至). Chin. Phys. B, 2018, 27(5): 053402.
[11]	Polarization and exchange effects in elastic scattering of electron with atoms and ions Zhang-Jin Chen(陈长进), Dan-Dan Cui(崔丹丹). Chin. Phys. B, 2018, 27(5): 053403.
[12]	Relativistic and distorted wave effects on Xe 4d electron momentum distributions Minfu Zhao(赵敏福), Xu Shan(单旭), Shanshan Niu(牛姗姗), Xiangjun Chen(陈向军). Chin. Phys. B, 2017, 26(9): 093103.
[13]	Semiclassical investigation of Coulomb focusing effects in atomic above-threshold ionization with elliptically polarized laser fields Chuan-Liang Wang(王传亮), Li-Xin Xia(夏立新), Hong-Bin Yao(姚洪斌), Wen-Liang Li(李文亮). Chin. Phys. B, 2017, 26(4): 043201.
[14]	Production of projectile and target K-vacancy in near-symmetric collisions of 60-100 MeV Cu⁹⁺ ions with thin Zn target Yipan Guo(郭义盼), Zhihu Yang(杨治虎), Shubin Du(杜树斌), Hongwei Chang(常宏伟), Qingliang Xia(夏清良), Qiumei Xu(徐秋梅). Chin. Phys. B, 2016, 25(3): 033401.
[15]	X-ray emission from 424-MeV/u C ions impacting on selected target Xian-Ming Zhou(周贤明), Rui Cheng(程锐), Yu Lei(雷瑜), Yuan-Bo Sun(孙渊博), Yu-Yu Wang(王瑜玉), Xing Wang(王兴), Ge Xu(徐戈), Ce-Xiang Mei(梅策香), Xiao-An Zhang(张小安), Xi-Meng Chen(陈熙萌), Guo-Qing Xiao(肖国青), Yong-Tao Zhao(赵永涛). Chin. Phys. B, 2016, 25(2): 023402.

No Suggested Reading articles found!

Viewed

Full text

Abstract

Cited

Metrics
Related Articles

ELECTRON IMPACT IONIZATION OF HELIUM FROM ITS GROUND AND METASTABLE STATES

Cite this article:

Online attention