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...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.展开更多
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)+1 种基金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)。
文摘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.
