Photodissociation/photoionization processes of chlorobromomethane induced by femtosecond laser pulses with pump-probe scheme
Photodissociation/photoionization processes of chlorobromomethane induced by femtosecond laser pulses with pump-probe scheme
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飞秒激光脉冲泵浦探针诱导氯溴甲烷的光解/光电离过程
DOI：
10.1007/s11434-008-0054-6
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发表时间：
2008-03
期刊：
影响因子：
--
通讯作者：
Zhang Bing
中科院分区：
文献类型：
--
作者：
Cao ZhenZhou;Zhang Feng;Wei ZhengRong;Zhang ChangHua;Zhang Bing
采用抽运-探测技术结合飞行时间质谱研究了飞秒激光脉冲诱导的氯溴甲烷（CH 2BrCl）的光解离/光电离过程.在泵浦脉冲（400 nm）和探测脉冲（800 nm）的不同延迟时间下观察到了主要的光产物，并得到了它们的时间依赖关系。结果表明，CH_2BrCl分子在A波段的衰减时间在100 fs以内。在0 ~ 150 fs的延迟时间内，碎片离子（CH_2Cl ~+和CH_2Br ~+）与母离子（CH_2BrCl ~+）的衰减趋势基本一致，其产额的相对比值保持不变。这些事实表明，碎片离子来自激发电子态的母离子的碎裂。由离子强度的相对比值得到了生成CH_2Cl ~+和CH_2Br ~+的几率分别为71.6%和14.2%。
The photodissociation/photoionization processes of chlorobromomethane (CH2BrCl) induced by femtosecond laser pulses have been investigated using pump-probe scheme combined with the time-of-flight mass spectra. The dominate photoproducts are observed at different delay time of the pump (400 nm) and probe (800 nm) pulses and the corresponding time-dependence of them is obtained. The results show that the decaying time of the molecule CH2BrCl in the A-band is in the 100 fs. The decaying tendencies of the fragment ions (CH2Cl+and CH2Br+) and the parent ion (CH2BrCl+) are almost the same and the relative ratios of the yields of them keep constant during the delay time of 0 to 150 fs. These facts suggest that the fragment ions come from the fragmentation of the parent ions in excited electronic states. The probabilities to form CH2Cl+and CH2Br+are obtained from the relative ratio of the ion intensity and are about 71.6% and 14.2%, respectively.
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DOI：
10.1063/1.2158999
发表时间：
2006-01
期刊：
The Journal of chemical physics
影响因子：
--
作者：
Jingang Zhou;K. Lau;Elsayed E. A. Hassanein;Haifeng Xu;S. Tian;B. Jones;C. Ng
通讯作者：
Jingang Zhou;K. Lau;Elsayed E. A. Hassanein;Haifeng Xu;S. Tian;B. Jones;C. Ng
影响因子：
2.8
作者：
T. Rozgonyi;T. Feurer;L. González
通讯作者：
T. Rozgonyi;T. Feurer;L. González
影响因子：
10.9
作者：
Qiu-sha Zheng;Ying Tang;Rongshu Zhu;Zhengrong Wei;Bing Zhang
通讯作者：
Qiu-sha Zheng;Ying Tang;Rongshu Zhu;Zhengrong Wei;Bing Zhang
影响因子：
1.8
作者：
Damrauer, NH;Dietl, C;Gerber, G
通讯作者：
Gerber, G
影响因子：
2.9
作者：
K. Suto;Yoshihiro Sato;C. L. Reed;V. Skorokhodov;Y. Matsumi;M. Kawasaki
通讯作者：
K. Suto;Yoshihiro Sato;C. L. Reed;V. Skorokhodov;Y. Matsumi;M. Kawasaki