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Effect of Reagent Rotational Excitation on Dynamics of F+H2→HF+H
Tian-gang Yang1,2, Long Huang2, Yu-run Xie2, Tao Wang2,3,4, Chun-lei Xiao2, Zhi-gang Sun*2,3, Dong-xu Dai2, Mao-du Chen*1, Dong H. Zhang2,3, Xue-ming Yang*2,3
1.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;2.State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Science, Dalian 116023, China;3.Synergetic Innovation Center of Quantum Information and Quantum Physics, University of Science and Technology of China, Hefei 230026, China;4.Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
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1,2, 黄龙2, 谢雨润2, 汪涛2,3,4, 肖春雷2, 孙志刚*2,3, 戴东旭2, 陈茂笃*1, 张东辉2,3, 杨学明*2,3
1.大连理工大学物理与光电工程学院,大连116024;2.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;3.中国科学技术大学量子信息和量子科技前沿协同创新中心,合肥230026;4.中国科学技术大学化学物理系,合肥230026
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
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