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

A New kHz Velocity Map Ion/Electron Imaging Spectrometer for Femtosecond Time-Resolved Molecular Reaction Dynamics Studies
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用于飞秒时间分辨分子反应动力学研究的新型 kHz 速度图离子/电子成像光谱仪

DOI:
10.1063/1674-0068/30/cjcp1702018
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发表时间:
2017-07
影响因子:
1
通讯作者:
Yang Xue ming
Yang Xue ming
中科院分区:
化学4区
文献类型:
--
作者:
He Zhi gang;Chen Zhi chao;Yan Dong yuan;Dai Dong xu;Wu Guo rong;Yang Xue ming

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建立了一种用于分子反应动力学研究的新型速度图成像光谱仪。通过结合kHz脉冲阀和ICCD相机,这种速度图成像光谱仪可以以1 kHz的重复率运行,与fs Ti:Sapphire激光系统完全兼容,有利于通常耗时的气相时间分辨研究。在200 nm波长下对NH3光解离过程进行了时间分辨速度图成像研究,H+NH2产物的时间分辨总动能释放谱提供了有关NH3解离动力学的丰富信息.这些结果表明,该装置是用时间分辨方法研究分子反应动力学的有力工具。
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.
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