Crossed Molecular Beam Study of H＋CH4 and H＋CD4 Reactions： Vibrationally Excited CH3/CD3 Product Channels  

交叉分子束方法研究H＋CH4和H＋CD4反应：CH3／CD3的振动激发态产物通道

作　　者：陈文韬 俞盛锐 袁道福 谢婷 杨家岳 王思雯 罗畅 谭玉欣 缪月 张未卿 吴国荣[3] 杨学明[1,3] 王兴安[1] 

机构地区：[1]中国科学技术大学化学物理系能源材料化学协同创新中心,合肥230026 [2]浙江师范大学杭州高等研究院,杭州311231 [3]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

出　　处：《Chinese Journal of Chemical Physics》2017年第6期609-613,I0001,共6页化学物理学报（英文）

摘　　要：We study the H＋CH4/CD4-＋H2/HD＋CH3/CD3 reactions using the time sliced velocity map ion imaging technique. Ion images of the CH3/CD3 products were measured by the （2＋1） resonance enhanced multi-photon ionization （REMPI） detection method. Besides the CH3/CD3 products in the ground state, ion images of the vibrationally excited CH3/CD3 products were also observed at two collision energies of 0.72 and 1.06 eV. It is shown that the angular distribution of the products CH3/CD3 in vibrationally excited states gradually vary from backward scattering to sideways scattering as the collision energy increases. Compared to the CH3/CD3 products in the ground state, the CH3/CD3 products in vibrationally excited states tend to be more sideways scattered, indicating that larger impact parameters play a more important role in the vibrationally excited product channels.

关 键 词：Velocity map ion imaging Crossed molecular beam Angular distribution Vibrationally excited state 

分 类 号：O[理学]