Charge transfer of keV-energy H+ ions in grazing scattering on Cu(100)

被引：0

作者：

Liang, Wenhao ^{[1
,2
]}

Weng, Yanghui ^{[1
,2
]}

Guo, Yue ^{[1
,2
]}

Zhong, Guang ^{[1
,2
]}

Wan, Lei ^{[1
,2
]}

Lin, Hong ^{[1
,2
]}

Ding, Bin ^{[1
,2
]}

Zhang, Luyao ^{[1
,2
]}

Wang, Jiawei ^{[1
,2
]}

Guo, Yanling ^{[1
,2
]}

Chen, Lin ^{[1
,2
]}

Chen, Ximeng ^{[1
,2
]}

Yang, Zhen ^{[3
]}

机构：

[1] Lanzhou Univ, Frontiers Sci Ctr Rare Isotopes, Sch Nucl Sci & Technol, Minist Educ, Lanzhou, Peoples R China

[2] Lanzhou Univ, Key Lab Special Funct Mat & Struct Design, Minist Educ, Lanzhou, Peoples R China

[3] Sun Yat Sen Univ, Sino French Inst Nucl Engn & Technol, Zhuhai, Peoples R China

来源：

RADIATION EFFECTS AND DEFECTS IN SOLIDS | 2023年 / 178卷 / 1-2期

基金：

中国国家自然科学基金;

关键词：

Charge transfer; negative ions; parallel velocity effect; threshold velocity; positive ions; electrons; PROJECTED BAND-GAP; AUGER NEUTRALIZATION; SURFACE COLLISIONS; ELECTRON-CAPTURE; NEGATIVE-IONS; HE+-IONS; HYDROGEN; IONIZATION; PROTONS; ATOMS;

D O I：

10.1080/10420150.2023.2186878

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

An experimental study of 0.5-5.0 keV-energy H+ ion scattering on Cu(100) has been presented at a grazing scattering angle of 7 degrees. The velocity dependent ion fractions have been measured in this work. The positive-ion fraction increases with the increase of incident velocity, which can be described by the exponential scaling. In particular, the threshold velocity for the positive-ion fraction is observed at about 0.25 a.u., and explained by the Auger ionization process. The negative-ion fraction increases monotonically with the impact velocity, which can be explained by the first type of the parallel velocity effect. Considering the formation of positive ions and the contribution of the parallel velocity effect, the negative-ion fraction is calculated by the modified theoretical model and the general trend is consistent with the experimental data.

引用

页码：160 / 173

页数：14

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