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Effect of Reagent Rotational Excitation on Dynamics of F+H2→HF+H
Tian-gang Yang,Long Huang,Yu-run Xie,Tao Wang,Chun-lei Xiao,Zhi-gang Sun*,Dong-xu Dai,Mao-du Chen*,Dong H. Zhang,Xue-ming Yang*
Author NameAffiliationE-mail
Tian-gang Yang Key Laboratory of Materials Modi cation by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, ChinaState Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China  
Long Huang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China  
Yu-run Xie State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China  
Tao Wang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, ChinaSynergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, ChinaDepartment of Chemical Physics, University of Science and Technology of China, Hefei 230026, China  
Chun-lei Xiao State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China  
Zhi-gang Sun* State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, ChinaSynergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China zsun@dicp.ac.cn 
Dong-xu Dai State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China  
Mao-du Chen* Key Laboratory of Materials Modi cation by Laser, Electron, and Ion Beams (Ministry of Education), School of Physics and Optoelectronic Technology, Dalian University of Technology, Dalian 116024, China mdchen@dlut.edu.c 
Dong H. Zhang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, ChinaSynergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China  
Xue-ming Yang* State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, ChinaSynergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China xmyang@dicp.ac.cn 
Abstract:
The dynamics of the F+H2(v=0,j=0, 1) reactions have been studied at the collision energy of 1.27 kcal/mol using a high-resolution crossed molecular beam apparatus. HF product rotational state resolved differential cross sections have been obtained at the v′=1, 2, 3 levels. The product HF(v′=2) angular distributions are predominantly backward scattered for both H2 (j=0, 1) reagents. However, the distributions of product HF(v′=2) rotational states for theF+H2(v=0,j=0) reaction are signi cantly di erent from those for the F+H2(v=0,j=1) reaction. Experimental results show that the rotational excitation of H2 produces rotationally ‘hotter’ HF(v′=2) product. In addition, the HF(v′=3) product is more likely scattered into the forward direction when the H2 reagent is populated at j=0 state, which could be attributed to a slow-down mechanism.
Key words:  Crossed molecular beam, Rydberg tagging, Differential cross sections
FundProject:
反应物转动激发对F+H2→HF+H体系反应动力学的影响
杨天罡,黄龙,谢雨润,汪涛,肖春雷,孙志刚*,戴东旭,陈茂笃*,张东辉,杨学明*
摘要:
利用高分辨的交叉分子束装置研究了F+H2(v=0,j=0, 1)反应在碰撞能1.27 kcal/mol下的动力学行为, 获得了产物HF(v′=1,2,3)转动态分辨的微分散射截面.当反应物H2 处于不同转动量子态j=0和1时,产物HF(v′=2)的散射角分布都主要表现为后向散射,但HF(v′=2)的转动态布居与反应物的转动量子态密切相关,转动激发的H2分子将产生转动“更热”的HF(v′=2) 产物.另外,对于HF(v′=3)产物通道,由于slow-down机理的影响,当H2布居于j=0时前向散射表现更显著.
关键词:  二氧化钛,激发态,双光子光电子能谱,时间分辨
DOI:10.1063/1674-0068/28/cjcp1505111
分类号: