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化学学报
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化学学报 ›› 2004, Vol. 62 ›› Issue (11): 1080-1084. 上一篇    下一篇

研究简报

CCl3Br光解动力学的离子速度影象研究

朱荣淑, 张嵩, 唐颖, 王艳梅, 唐碧, 姬磊, 张冰   

  1. 中国科学院武汉物理与数学研究所波谱与原子分子物理国家重点实验室, 武汉, 430001
  • 投稿日期:2003-06-23 修回日期:2004-02-12 发布日期:2014-02-17
  • 通讯作者: 张冰,E-mail:bzhang@wipm.ac.cn;Tel:027-87197441;Fax:027-87199291. E-mail:bzhang@wipm.ac.cn

Study on the Ion Velocity Mapping of the Photodissociation Dynamics of CCl3Br

ZHU Rong-Shu, ZHANG Song, TANG Ying, WANG Yan-Mei, TANG Bi-Feng, JI Lei, ZHANG Bing   

  1. State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
  • Received:2003-06-23 Revised:2004-02-12 Published:2014-02-17

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为建立高分辨的离子速度影象装置,进行了"离子透镜"的精确设计,得到了"将离子源空间分布中速度相同而位置不同的离子聚焦在同点上"的效果.同时在新建立的装置上研究了CCl3Br在267nm附近的光解反应产物Br(2P3/2)和Br*(2P1/2)的速度和角度的分布.利用实验得到的各向异性参数β(Br)=-O.48,β(Br*)=1.44,讨论和分析了分子可能的解离通道.

关键词: 离子速度影象, 离子透镜, CCl3Br, 光解动力学

An accurate ion lens was simulated using a 3D ion trajectory simulation package (Simion 7.0). The simulation got an effect that all particles with the same initial velocity vector were mapped onto the same point on the detector. A high-resolution apparatus of ion velocity mapping was built by using the simulating result. The photodissociation dynamics of the Cl3Br was studied at 267 nm. The three dimensional velocity and angular distributions of Br(2P3/2) and Br*(2P1/2) were determined. The values of anisotropy parameter β were β(Br)=-0.48 and β(Br*)=1.44, respectively. A qualitative model of the photodissociation dynamics of Cl3Br was suggested.

Key words: ion velocity mapping, ion lens, CCl3Br, photodissociation dynamics