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Cross sections of O~(q+) (q = 1 - 4) electron loss in collisions with He, Ne and Ar

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成果类型:
期刊论文
作者:
Lu Yan-Xia;Lu Xing-Qiang;Song Xiang;Zhang Bo-Li
通讯作者:
Lu, Y.-X.
作者机构:
School of Nuclear Science and Technology, University of South China, Hengyang 421001, China
[Lu Yan-Xia; Lu Xing-Qiang; Song Xiang; Zhang Bo-Li] School of Nuclear Science and Technology, University of South China
通讯机构:
[Lu Yan-Xia] Univ S China, Sch Nucl Sci & Technol, Hengyang 421001, Peoples R China.
School of Nuclear Science and Technology, University of South China, China
语种:
英文
关键词:
cross section;electron loss;ion-atom collision
期刊:
Chinese Physics B
期刊(中文):
中国物理B:英文版
ISSN:
1674-1056
年:
2011
卷:
20
期:
3
页码:
033402-1-033402-5
基金类别:
Project supported by the Special Foundation for Key Programs of Basic Research at its earlier stage, Ministry of Science and Technology, China(Grant No. 2002CCA00900) and by the Foundation for the Doctors of University of South China (Grant No. 5-2007-XQD-001). This experiment was successfully done with the great assistance of Dr. Yu Deyang, Prof. Liu Zhaoyuan and Engineers Chen Zichun and Li Lanting. We thank them very much for their remarkable work.
机构署名:
本校为第一且通讯机构
院系归属:
核科学技术学院
摘要:
Electron-loss cross sections of O~(q+) (q = 1-4) colliding with He, Ne and Ar atoms are measured in the intermediate velocity regime. The ratios of the cross sections of two-electron loss to that of one-electron loss R21 are presented. It is shown that single-channel analysis is not sufficient to explain the results, but that projectile electron loss, electron capture by the projectile and target ionization must be considered together to interpret the experimental data. The screening and antiscreening effects can account for the threshold velocity results, but cannot explain the dependence of the ratio R21 on velocity quantitatively. In general, the effective charge of the target atom increases with velocity increasing because the high-speed projectile ion can penetrate into the inner electronic shell of target atom. Ne and Ar atoms have similar effective charges in this velocity regime, but He atoms have smaller ones at the same velocities due to its smaller nuclear charge

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