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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
陈文韬1, 俞盛锐2, 袁道福1, 谢婷1, 杨家岳3, 王思雯1, 罗畅1, 谭玉欣1, 缪月1, 张未卿3, 吴国荣3, 杨学明1,3, 王兴安1
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
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DOI:10.1063/1674-0068/30/cjcp1711215
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基金项目:This work was supported by the National Key R&D Program of China (No.2016YFF0200501), the National Natural Science Foundation of China (No.21403207, No.21473173, and No.21590802), the Strategic Priority Research Program of Chinese Academy of Sciences (No.XDB 17010000), and University of Science and Technology of China.
Crossed Molecular Beam Study of H+CH4 and H+CD4 Reactions: Vibrationally Excited CH3/CD3 Product Channels
Wen-tao Chen1, Sheng-rui Yu2, Dao-fu Yuan1, Ting Xie1, Jia-yue Yang3, Si-wen Wang1, Chang Luo1, Yu-xin Tan1, Yue Miao1, Wei-qing Zhang3, Guo-rong Wu3, Xue-ming Yang1,3, Xing-an Wang1
1.Center for Advanced Chemical Physics, (iChEM, Collaborative Innovation Center of Chemistry for Energy Materials), Department of Chemical Physics, School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China;2.Hangzhou Institute of Advanced Studies, Zhejiang Normal University, Hangzhou 311231, China;3.State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Dalian 116023, China
Abstract:
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.
Key words:  Velocity map ion imaging  Crossed molecular beam  Angular distribution  Vibrationally excited state
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