A New kHz Velocity Map Ion/Electron Imaging Spectrometer for Femtosecond Time-Resolved M olecular Reaction Dynamics Studies  

用于飞秒时间分辨分子反应动力学研究的千赫兹离子／电子速度成像仪

作　　者：贺志刚[1,2] 陈志超[1,2] 杨栋元[1,2] 戴东旭[1] 吴国荣[1] 杨学明[1] 

机构地区：[1]中国科学院大连化学物理研究所,分子反应动力学国家重点实验室,大连116023 [2]中国科学院大学,北京100049

出　　处：《Chinese Journal of Chemical Physics》2017年第3期247-252,I0001,共7页化学物理学报（英文）

基　　金：This work was supported by the National Basic Research Program of China （No.2013CB922200）, the Ministry of Science and Technology of China （No.2012YQ12004704）, and the National Natural Science Foundation of China （No.21573228）.

摘　　要：A new velocity map imaging spectrometer is constructed for molecular reaction dynamics studies using time-resolved photoelectron/ion spectroscopy method. By combining a kHz pulsed valve and an ICCD camera, this velocity map imaging spectrometer can be run at a repetition rate of 1 kHz, totally compatible with the fs Ti：Sapphire laser system, facilitating time-resolved studies in gas phase which are usually time-consuming. Time-resolved velocity map imaging study of NH3 photodissociation at 200 nm was performed and the time-resolved total kinetic energy release spectrum of H＋NH~ products provides rich information about the dissociation dynamics of NH3. These results show that this new apparatus is a powerful tool for investigating the molecular reaction dynamics using time-resolved methods.

关 键 词：Photoelectron spectrum Pump/probe Femtosecond time-resolved 

分 类 号：O[理学]