CCl_3Br光解动力学的离子速度影象研究  

Study on the Ion Velocity Mapping of the Photodissociation Dynamics of CCl_3Br

作　　者：朱荣淑[1] 张嵩[1] 唐颖[1] 王艳梅[1] 唐碧 姬磊[1] 张冰[1] 

机构地区：[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430071

出　　处：《化学学报》2004年第11期1080-1084,M006,共6页Acta Chimica Sinica

摘　　要：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一点上”的效果 .同时在新建立的装置上研究了CCl3 Br在 2 67nm附近的光解反应产物Br( 2 P3 / 2 )和Br ( 2 P1 / 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) =-0 .48,β(Br ) =1.44 。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 CCl3Br was studied at 267 rim. The three-dimensional velocity and angular distributions of Br(P-2(3/2)) and Br* (P-2(1/2)) were determined. The values of anisotropy parameter beta were beta (Br) = -0.48 and beta (Br*) = 1.44, respectively. A qualitative model of the photodissociation dynamics Of CCl3Br was suggested.

关 键 词：一氯三溴甲烷 光解动力学 离子速度影象 离子透镜 各向异性 

分 类 号：O643.1[理学—物理化学]