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A New kHz Velocity Map Ion/Electron Imaging Spectrometer for Femtosecond Time-Resolved Molecular Reaction Dynamics Studies
Zhi-gang He1,2, Zhi-chao Chen1,2, Dong-yuan Yang1,2, Dong-xu Dai1, Guo-rong Wu1, Xue-ming Yang1
1.State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Dalian 116023, China;2.University of Chinese Academy of Sciences, Beijing 100049, China
Abstract:
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+NH2 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.
Key words:  Photoelectron spectrum  Pump/probe  Femtosecond time-resolved
FundProject: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).
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
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
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
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DOI:10.1063/1674-0068/30/cjcp1702018
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