文献类型：期刊文章

作　　者：吴国荣[1] 张竟辉[2] Steven A.Harich[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]中央研究院原子与分子科学研究所

出　　处：《Chinese Journal of Chemical Physics》

基　　金：This work was supported by the Chinese Academy of Sciences, the Ministry of Science and Technology;the National Natural Science Foundation of China （No.29973044）.

年　　份：2006

卷　　号：19

期　　号：2

起止页码：109-116

语　　种：中文

收录情况：AJ、BDHX、BDHX2004、CAS、CSCD、CSCD2011_2012、INSPEC、JST、RSC、SCI(收录号：WOS:000237684100005)、SCI-EXPANDED(收录号：WOS:000237684100005)、SCIE、SCOPUS、WOS、ZGKJHX、核心刊

摘　　要：Photodissociation dynamics of the CH3 radical at 212.5 nm excitation has been studied experimentally using the H atom Rydberg tagging time-of-flight method. CH3 radicals are produded by photodissociation of CH3I at 266 nm. Translational energy distribution and angular distribution for the CH2 product from CH3 photodissociation at different vibrational levels via the 3s Rydberg state have been measured. From these distributions, product J state distributions are obtained for photodissociation of different vibrationally excited CH3 radicals. The effect of parent vibrational as well as rotational excitation on the dissociation dynamics of CH3 is also investigated in detail. Experimental results in this work show that parent vibrational excitation in the umbrella mode has a significant effect on both rotational excitation and angular distribution of the CH2 product, while parent rotational excitation has obvious effect only on the angular distribution of CH2 product.

关 键 词：High Rydberg state  CH3 radical  PHOTODISSOCIATION

分 类 号：O621.146] O613.71[化学类]