Ultrafast dynamics of cationic electronic states of vinyl bromide by strong-field ionization-photofragmentation  

作　　者：Long-Xing Zhou Yang Liu Shen He Da-Shuai Gao Xing-Chen Shen Qi Chen Tao Yu Hang Lv Hai-Feng Xu 周龙兴;刘洋;贺屾;高大帅;沈星晨;陈淇;于涛;吕航;徐海峰(Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China;Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy,Jilin University,Changchun 130012,China)

机构地区：[1]Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China [2]Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy,Jilin University,Changchun 130012,China

出　　处：《Chinese Physics B》2022年第2期641-645,共5页中国物理B（英文版）

基　　金：supported by the National Key Research and Development Program of China(Grant No.2019YFA0307700);the National Natural Science Foundation of China(Grant Nos.11874179,11704149,and 12074144);the Natural Science Foundation of Jilin Province,China(Grant Nos.20180101289JC and 20190103045JH);the Science and Technology Project of the Jilin Provincial Education Department,China(Grant No.JJKH20190184KJ)。

摘　　要：Strong field ionization-photofragmentation(SFI-PF)with ultrafast pump–probe scheme is a powerful approach to study the dynamics of molecular cationic electronic states.Here we carry out a SFI-PF study on the cationic electronic states of vinyl bromide,C_(2)H_(3)Br.The yields of the parent C_(2)H_(3)Br_(+)and the formation of the fragment(Br^(+),C_(2)H^(+)2 and C_(2)H^(+)3)ions have been measured at different pump–probe delay time.Analysis provides experimental evidence of A^(2)A'–X^(2)A'' internal conversion of vinyl bromide cations which occurs in a time of about 220 fs,and the time of C_(2)H_(3)^(+) formation induced by the dissociation of the A^(2)A' state around 300 fs.The study would add our knowledge of the behavior of electronic excited states of complex molecular cations.

关 键 词：strong field ionization ultrafast dynamics vinyl bromide cation 

分 类 号：O643.1[理学—物理化学]