Electron emission induced by keV protons from tungsten surface at different temperatures

doi:10.1088/1674-1056/ac632f

中国物理B ›› 2022, Vol. 31 ›› Issue (7): 73202-073202.doi: 10.1088/1674-1056/ac632f

Electron emission induced by keV protons from tungsten surface at different temperatures

Li-Xia Zeng(曾利霞)^1,2,†, Xian-Ming Zhou(周贤明)^1,2, Rui Cheng(程锐)³, Yu Liu(柳钰)¹, Xiao-An Zhang(张小安)^1,3, and Zhong-Feng Xu(徐忠锋)^2,3,‡

1 Ion Beam and Optical Physical Laboratory, Xianyang Normal University, Xianyang 712000, China;
2 Institute of Science and Technology for Laser and Particle Beams, Xi'an Jiaotong University, Xi'an 710049, China;
3 Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China

收稿日期:2021-11-26 修回日期:2022-02-17 接受日期:2022-04-01 出版日期:2022-06-09 发布日期:2022-06-21
通讯作者: Li-Xia Zeng, Zhong-Feng Xu E-mail:zenglixia1982@126.com;zhfxu@mail.xjtu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11605147, 11375138, and 11505248), the Natural Science Basic Research Plan in Shaanxi Province, China (Grant Nos. 2019JQ-493 and 2021JQ-812), the Scientific Research Program Funded by Shaanxi Provincial Education Department, Shaanxi Province, China (Grant Nos. 20JK0975 and 16JK1824), the Shaanxi University Young Outstanding Talents Support Program, the Xianyang Normal University Young and Middle-aged Top-notch Talents Project, Shaanxi Province, China (Grant No. XSYBJ202004), and the Academic Leader Project of Xianyang Normal University, Shaanxi Province, China (Grant No. XSYXSDT202109).

Electron emission induced by keV protons from tungsten surface at different temperatures

Li-Xia Zeng(曾利霞)^1,2,†, Xian-Ming Zhou(周贤明)^1,2, Rui Cheng(程锐)³, Yu Liu(柳钰)¹, Xiao-An Zhang(张小安)^1,3, and Zhong-Feng Xu(徐忠锋)^2,3,‡

1 Ion Beam and Optical Physical Laboratory, Xianyang Normal University, Xianyang 712000, China;
2 Institute of Science and Technology for Laser and Particle Beams, Xi'an Jiaotong University, Xi'an 710049, China;
3 Institute of Modern Physics, Chinese Academy of Science, Lanzhou 730000, China

Received:2021-11-26 Revised:2022-02-17 Accepted:2022-04-01 Online:2022-06-09 Published:2022-06-21
Contact: Li-Xia Zeng, Zhong-Feng Xu E-mail:zenglixia1982@126.com;zhfxu@mail.xjtu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11605147, 11375138, and 11505248), the Natural Science Basic Research Plan in Shaanxi Province, China (Grant Nos. 2019JQ-493 and 2021JQ-812), the Scientific Research Program Funded by Shaanxi Provincial Education Department, Shaanxi Province, China (Grant Nos. 20JK0975 and 16JK1824), the Shaanxi University Young Outstanding Talents Support Program, the Xianyang Normal University Young and Middle-aged Top-notch Talents Project, Shaanxi Province, China (Grant No. XSYBJ202004), and the Academic Leader Project of Xianyang Normal University, Shaanxi Province, China (Grant No. XSYXSDT202109).

摘要/Abstract

摘要： The electron emission yield is measured from the tungsten surface bombarded by the protons in an energy range of 50 keV-250 keV at different temperatures. In our experimental results, the total electron emission yield, which contains mainly the kinetic electron emission yield, has a very similar change trend to the electronic stopping power. At the same time, it is found that the ratio of total electron emission yield to electronic stopping power becomes smaller as the incident ion energy increases. The experimental result is explained by the ionization competition mechanism between electrons in different shells of the target atom. The explanation is verified by the opposite trends to the incident energy between the ionization cross section of M and outer shells.

关键词: electron emission, x-ray, electronic stopping power, work function

Abstract: The electron emission yield is measured from the tungsten surface bombarded by the protons in an energy range of 50 keV-250 keV at different temperatures. In our experimental results, the total electron emission yield, which contains mainly the kinetic electron emission yield, has a very similar change trend to the electronic stopping power. At the same time, it is found that the ratio of total electron emission yield to electronic stopping power becomes smaller as the incident ion energy increases. The experimental result is explained by the ionization competition mechanism between electrons in different shells of the target atom. The explanation is verified by the opposite trends to the incident energy between the ionization cross section of M and outer shells.

Key words: electron emission, x-ray, electronic stopping power, work function

中图分类号: (Inner-shell excitation and ionization)

32.80.Aa

32.30.Rj (X-ray spectra) 34.80.Dp (Atomic excitation and ionization) 79.20.Rf (Atomic, molecular, and ion beam impact and interactions with surfaces)

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). Electron emission induced by keV protons from tungsten surface at different temperatures[J]. 中国物理B, 2022, 31(7): 73202-073202.

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Electron emission induced by keV protons from tungsten surface at different temperatures

Electron emission induced by keV protons from tungsten surface at different temperatures

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