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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 |
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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.
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Received: 26 November 2021
Revised: 17 February 2022
Accepted manuscript online: 01 April 2022
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PACS:
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32.80.Aa
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(Inner-shell excitation and ionization)
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32.30.Rj
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(X-ray spectra)
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34.80.Dp
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(Atomic excitation and ionization)
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79.20.Rf
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(Atomic, molecular, and ion beam impact and interactions with surfaces)
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| Fund: 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). |
Corresponding Authors:
Li-Xia Zeng, Zhong-Feng Xu
E-mail: zenglixia1982@126.com;zhfxu@mail.xjtu.edu.cn
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Cite this article:
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 2022 Chin. Phys. B 31 073202
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