摘要
The double ionization process of molecules driven by co-rotating two-color circularly polarized fields is investigated with a three-dimensional classical ensemble model. Numerical results indicate that a considerable part of the sequential double ionization(DI) events of molecules occur through internal collision double ionization(ICD), and the ICD recollision mechanism is significantly different from that in non-sequential double ionization(NSDI). By analyzing the results of internuclear distances R = 5 a.u. and 2 a.u., these two recollision mechanisms are studied in depth. It is found that the dynamic behaviors of the recollision mechanisms of NSDI and ICD are similar. For NSDI, the motion range of electrons after the ionization is relatively large, and the electrons will return to the core after a period of time. In the ICD process,electrons will rotate around the parent ion before ionization, and the distance of the electron motion is relatively small. After a period of time, the electrons will come back to the core and collide with another electron. Furthermore, the molecular internuclear distance has a significant effect on the electron dynamic behavior of the two ionization mechanisms. This study will help to understand the multi-electron ionization process of complex systems.
作者
李雪峰
乔月
吴丹
蔚瑞贤
陈基根
王俊
郭福明
杨玉军
Xue-Feng Li;Yue Qiao;Dan Wu;Rui-Xian Yu;Ji-Gen Chen;Jun Wang;Fu-Ming Guo;Yu-Jun Yang(Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China;Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy,Changchun 130012,China;School of Science,Jilin Institute of Chemical Technology,Jilin 132022,China;Zhejiang Provincial Key Laboratory for Cutting Tools,Taizhou University,Jiaojiang 318000,China)
基金
the National Key Research and Development Program of China (Grant No.2019YFA0307700)
the National Natural Science Foundation of China (Grant Nos.12074145 and 11975012)
Jilin Provincial Research Foundation for Basic Research,China (Grant No.20220101003JC)
Jilin Provincial Education Department (Grant No.JJKH20230284KJ)。
