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Contribution from recoiling atoms in secondary electron emission induced by slow highly charged ions from tungsten surface

Published online by Cambridge University Press:  30 October 2012

Lixia Zeng ,
Zhongfeng Xu ,
Yongtao Zhao ,
Yuyu Wang ,
Jianguo Wang ,
Rui Cheng ,
Xiaoan Zhang ,
Jieru Ren ,
Xianming Zhou  and
Xing Wang
...Show all authors
Lixia Zeng
Affiliation:
HCI Joint Center of Xi'an Jiaotong University and the National Laboratory for the Heavy Ion Research Facility in Lanzhou, Xi'an, China Department of Applied Physics, Xi'an Jiaotong University, Xi'an, China School of Physics and Electronic Engineering, Xianyang Normal University, Xianyang, China
Zhongfeng Xu*
Affiliation:
HCI Joint Center of Xi'an Jiaotong University and the National Laboratory for the Heavy Ion Research Facility in Lanzhou, Xi'an, China Department of Applied Physics, Xi'an Jiaotong University, Xi'an, China Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Yongtao Zhao*
Affiliation:
HCI Joint Center of Xi'an Jiaotong University and the National Laboratory for the Heavy Ion Research Facility in Lanzhou, Xi'an, China Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Yuyu Wang
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Jianguo Wang
Affiliation:
HCI Joint Center of Xi'an Jiaotong University and the National Laboratory for the Heavy Ion Research Facility in Lanzhou, Xi'an, China Department of Applied Physics, Xi'an Jiaotong University, Xi'an, China
Rui Cheng
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Xiaoan Zhang
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China School of Physics and Electronic Engineering, Xianyang Normal University, Xianyang, China
Jieru Ren
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Xianming Zhou
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Xing Wang
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Yu Lei
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Yongfeng Li
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Yang Yu
Affiliation:
Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Xueliang Liu
Affiliation:
HCI Joint Center of Xi'an Jiaotong University and the National Laboratory for the Heavy Ion Research Facility in Lanzhou, Xi'an, China Department of Applied Physics, Xi'an Jiaotong University, Xi'an, China
Guoqing Xiao
Affiliation:
HCI Joint Center of Xi'an Jiaotong University and the National Laboratory for the Heavy Ion Research Facility in Lanzhou, Xi'an, China Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China
Fuli Li
Affiliation:
HCI Joint Center of Xi'an Jiaotong University and the National Laboratory for the Heavy Ion Research Facility in Lanzhou, Xi'an, China Department of Applied Physics, Xi'an Jiaotong University, Xi'an, China
*
Address correspondence and reprint requests to: Zhongfeng Xu, Department of Applied Physics, Xi'an Jiaotong University, Xi'an, China. E-mail: zhfxu@mail.xjtu.edu.cn; or Yongtao Zhao, Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China. E-mail: zhaoyt@impcas.ac.cn
Address correspondence and reprint requests to: Zhongfeng Xu, Department of Applied Physics, Xi'an Jiaotong University, Xi'an, China. E-mail: zhfxu@mail.xjtu.edu.cn; or Yongtao Zhao, Institute of Modern Physics, Chinese Academy of Science, Lanzhou, China. E-mail: zhaoyt@impcas.ac.cn
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Abstract

The electron emission yield γ induced by Ne2+ and O2+ impacting on a clean tungsten surface has been measured. The range of projectile energy is from 3 keV/u to 14 keV/u. The total electron yield gradually increases with the projectile velocity. It is found simultaneously that the total electron yield for O2+ is larger than the total electron yield for Ne2+, which is opposite to the results for higher projectile velocity. After considering the contribution from recoiling atoms to the energy distribution and electron emission yield, we find that recoiling atoms are of crucial importance in electron emission in our energy range. Thus, the unexpected results in our experiment can be explained successfully.

Keywords

Electron emission yieldEnergy distributionHighly charged ionsRecoiling atomsStopping power
Type
Research Article
Information
Laser and Particle Beams , Volume 30 , Issue 4 , December 2012 , pp. 707 - 711
Copyright
Copyright © Cambridge University Press 2012

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