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学科主题: 物理化学
题名: De-excitation dynamics of small molecules investigated by femtosecond multiphoton ionization
作者: Wang L(王利) ;  Liu HP(刘洪平) ;  Yin SH(尹淑慧) ;  Zhang JY(张建阳) ;  Lou NQ(楼南泉)
会议名称: International Symposium on Ultrafast Phenomena & Terahertz Waves
会议日期: 2000-7-22
出版日期: 2000-07-22
会议地点: 中国
其他题名: 用飞秒多光子电离研究小分子激发态动力学
通讯作者: 王利
部门归属: 十一室
主办者: 中国科学院物理研究所
摘要: De-excitation dynamics of small molecules investigated by femtosecond multiphoton ionization By using home-made solid-state kilohertz femtosecond laser system and time-of-flight mass spectrometer (TOF-MS), the de-excitation dynamics of small molecules, such as OCS, CS2 and NH3, are investigated in real time. The cross correlation width is identified as 141fs by Xe pump-probe experiment. The lifetime of OCS in its Rydberg state [1] is experimentally determined to be fs for the first time. This picosecond decay process indicates that the excited state is predissociative. Rydberg states of CS2 [2] de-excites in 948 ± 23 fs. For NH3, for the first real-time, the lifetime constant in ¢1A1¢ state is determined as 936 ± 92 fs. The internal conversion predissociation mechanism of the ¢1A1¢ state, suggested by Dixon et al. [3] can be used to interpret this de-excitation process.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/111278
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Wang L,Liu HP,Yin SH,et al. De-excitation dynamics of small molecules investigated by femtosecond multiphoton ionization[C]. 见:International Symposium on Ultrafast Phenomena & Terahertz Waves. 中国. 2000-7-22.
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