Effects of rotational excitation on vibrationally excited reaction of F+H_(2)(v=1,j=1)→HF+H at collision energy of 0.62 kcal/mol  

振动激发的F+H_(2)(v=1,j=1)→HF+H反应在碰撞能0.62 kcal/mol时的转动激发效应

作　　者：Wei Wang Yurun Xie Long Huang Tiangang Yang Shu Liu Chunlei Xiao Donghui Zhang Xueming Yang 王威;谢雨润;黄龙;杨天罡;刘舒;肖春雷;张东辉;杨学明(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;南方科技大学理学院,深圳518055;中国科学院大学化学科学学院,北京100049;深圳综合粒子设施研究院,深圳518107;合肥国家实验室,合肥230088)

机构地区：[1]State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023,China [2]College of Science,Southern University of Science and Technology,Shenzhen 518055,China [3]School of Chemical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China [4]Institude of Advanced Science Facilities,Shenzhen 518107,China [5]Hefei National Laboratory,Hefei 230088,China

出　　处：《Chinese Journal of Chemical Physics》2024年第6期851-856,I0043,共7页化学物理学报(英文)

基　　金：the National Natural Science Foundation of China(Nos.22288201,22173040,22241301,22103032);the Chinese Academy of Sciences(No.GJJSTD20220001),the Innovation Program for Quantum Scienceand Technology(No.2021ZD0303300);the Guangdong Science and Technology Program(Nos.2019ZT08L455,2019JC01X091);the Shenzhen Science and Technology Innovation Committee(Nos.JCYJ20210324103810029,20220815145746004,and 2021344670);the Shenzhen Science and Technology Program(No.DSYS20200421111001787).

摘　　要：The F+H_(2)reaction has long been a benchmark system in reaction dynamics.We report here a combined experimental and theoretical study on the F+H_(2)(v=1,j=1)reaction at a collision energy of 0.62 kcal/mol.The rotational state-resolved differential cross sections(DCSs)as well as the integral cross sections(ICSs)were obtained by the crossed beam experiment and the quantum dynamical calculation.It is found that the rotationally excited state F+H_(2)(v=1,j=1)reaction produces rotationally hotter but vibrationally colder products,compared with the rotational ground state reaction at the same total energy.The stereodynamics of the F+H_(2)(v=1,j=1)reaction is also analyzed theoretically,showing that minor differences exist for the reactants initially prepared in different spatial alignments.F+H_(2)反应长期以来一直是反应动力学研究的基准体系.本文报告了对碰撞能量为0.62 kcal/mol的F+H_(2)(v=1,j=1)反应的实验和理论结合的研究.通过交叉束实验和量子动力学计算获得了转动态分辨的微分截面和积分截面.研究发现,与相同总能量下的转动基态反应相比,转动激发态F+H_(2)(v=1,j=1)反应生成转动较热但振动较冷的产物.本文还对F+H_(2)(v=1,j=1)反应的立体动力学进行了理论分析,结果表明,对于不同初始空间取向的反应物,反应得到的产物布居存在微小的差异.

关 键 词：F+H_(2) Vibrationally excited reaction Crossed beam experiment STEREODYNAMICS Rotational excitation 

分 类 号：O643.1[理学—物理化学]