Orientation Effect in Ar Dimer Fragmentation by Ne8+ Ion Impact

• 作者: Chuai Xiaoya Feng Wentian Gao Yong Guo Dalong Huang Zhongkui Ma Xinwen Qian Dongbin Wang Hanbing Xu Shenyue Yan Shuncheng Zhang Pengju Zhang Ruitian Zhang Shaofeng Zhao Dongmei Zhu Xiaolong
• 来源期刊: 中国科学院近代物理研究所和兰州重离子研究装置年报:英文版
• 学科: 物理学
• 关键词: mounted DOUBLE APPROXIMATE
• 年，卷（期）: 2018,（1）
• 页码范围: 65-66
• 页数: 2页
• 分类号: O57

摘要

The experiment was carried out using the Reaction Microscope mounted at the 320 kV platform for multidisciplinary research with highly charged ions at the Institute of Modern Physics,CAS[1;2].For reaction channel of(Ar2)2+!Ar++Ar+,the kinetic energy release(KER)distribution clearly shows two peaks.The left peak locates at 3.7 eV approximately,and the right one lies at about 5.3 eV.From the classical reflection approximation KER/(Z1
Z2)=R,the internuclear distance R can be deduced.We find that the corresponding internuclear distance of the left peak is 3.8˚A,which is the equilibrium internuclear distance of the Ar2 dimer.This indicates that coulomb explosion takes place immediately after the double ionization process,without the involvement of the geometry change of the cluster ion.Therefore,the left peak dominantly arises from two-site double ionization.