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High Resolution Crossed Molecular Beams Study on the F+HD→HF+D Reaction at Collision Energy of 5.43?18.73 kJ/mol
Wen-rui Dong,Chun-lei Xiao,Tao Wang,Dong-xu Dai,Xiu-yan Wang,Xue-ming Yang*
Author NameAffiliationE-mail
Wen-rui Dong State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Chun-lei Xiao State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Tao Wang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Dong-xu Dai State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Xiu-yan Wang State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Xue-ming Yang* State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China xmyang@dicp.ac.cn 
Abstract:
The dynamics of F+HD→HF+D reaction has been studied at ten collision energies rang-ing from 5.43 kJ/mol to 18.73 kJ/mol using high-resolution H/D atom Rydberg tagging time-of-flight method. Product vibrational and rotational state-resolved differential cross sections have been determined. The intensity of the HF(v′=2) forward products decreases as the collision energy increases, suggesting that the resonance contribution is reduced as the collision energy increases. The forward peak of HF(v′=3) product has also been observed above the threshold of this product channel. Product energy disposals in different degrees of freedom have been analyzed. The collision energy dependence of the HF vibrational product branching was also determined. This work presents a comprehensive dynamic picture of this resonance mediated reaction in a wide collision energy regime, providing a good test ground for theoretical understandings of this interesting reaction at higher collision energies.
Key words:  F+HD→HF+D, Crossed molecular beam, Rydberg tagging, Reactive reso-nance
FundProject:
高分辨交叉分子束实验研究F+HD→HF+D在碰撞能为5.43~18.73 kJ/mol的反应
董文锐,肖春雷,汪涛,戴东旭,王秀岩,杨学明*
摘要:
运用高分辨的H/D原子里德堡标记飞行时间谱方法,研究了F+HD→HF+D反应在5.43~18.73 kJ/mol十个碰撞能下的动力学过程. 获取了产物振转态分辨的微分截面. HF(v′=2)前向产物的强度随着碰撞能的增大而降低,表明随着碰撞能的增大共振贡献减弱. 当碰撞能高于HF(v′=3)产物的阈值能量时,观察到了该产物的前向散射峰. 分析了总能量在产物振动、转动和平动中的分配以及HF产物的振动分支比随碰撞能的变化关系.
关键词:  F+HD→HF+D,交叉分子束,里德堡标记,反应共振
DOI:10.1088/1674-0068/24/05/507-514
分类号: