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High Resolution Crossed Molecular Beams Study on the F+HD→DF+H Reaction at Collision Energy of 8.19-18.98 kJ/mol
Wen-rui Dong, Chun-lei Xiao, Tao Wang, Dong-xu Dai, Xiu-yan Wang, Xue-ming Yang*
State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
Abstract:
The crossed beams scattering dynamics of the F+HD→DF+H reaction have been studied at collision energies ranging from 8.19 kJ/mol to 18.98 kJ/mol using the high resolution H-atom Rydberg tagging time-of-flight method. Product rotational state-resolved differen-tial cross sections have been measured. Most of the DF products are backward scattered at low collision energies and then gradually shift to the sideway as the collision energy in-creases. In addition to the backward and sideway scatterings, we have also observed the DF(v′=4) product in the forward direction for the first time for this reaction. The forward scattering DF(v′=4) product also increases with the collision energy. Angular and collision energy dependence of the product energy disposals in different degrees of freedom have been determined. Collision energy dependence of the vibrational branching ratios has also been examined. Possible dynamical origins of the forward scattering DF(v′=4) products were discussed.
Key words:  F+HD→DF+H, Crossed molecular beam, Rydberg tagging
FundProject:
高分辨交叉分子束实验研究F+HD→DF+H在碰撞能为8.19~ 18.98 kJ/mol的反应
董文锐, 肖春雷, 汪涛, 戴东旭, 王秀岩, 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
摘要:
运用高分辨的H原子里德堡标记飞行时间谱方法, 研究了F+HD→DF+H反应在碰撞能为8.19~18.98 kJ/mol的动力学过程. 获取了产物振转态分辨的微分截面. 在低碰撞能,DF产物主要为后向散射;随着碰撞能的增加侧向散射产物增强. 除了后向和侧向散射产物,还首次观察到了该反应中的DF(v′=4)前向散射产物. 随着碰撞能的增加,DF(v′=4)前向散射产物逐渐增强. 分析了总能量在产物振动、转动和平动中的分配随碰撞能以及散射角的变化;获得了DF产物的振动分支比随碰撞能的变化关系. 同时也对DF(v
关键词:  F+HD→DF+H,交叉分子束,里德堡标记
DOI:10.1088/1674-0068/24/05/521-528
分类号: