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Photodissociation of HOD via the Ĉ1B1 State: OD/OH Branching Ratio and OD Bond Dissociation Energy
Li-na Cheng,Yuan Cheng,Kai-jun Yuan*,Qing Guo,Tao Wang,Dong-xu Dai,Xue-ming Yang*
Author NameAffiliationE-mail
Li-na Cheng State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Yuan Cheng State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China  
Kai-jun Yuan* State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China kjyuan@dicp.ac.cn 
Qing Guo 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  
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:
Photodissociation of jet-cooled HOD via the ? state around 124 nm has been studied using the H(D)-atom Rydberg tagging time-of-flight technique. Rotational state resolved action spectrum and the product translational energy distribution spectra have been recorded for both D+OH and H+OD dissociation channels. Product channel OH/OD branching ratios for the individual ?- X rotational transition have been determined. A comparison is also given with the B- X and ?- X transitions. In addition, the dissociation energy of the OD bond in HOD has been determined accurately to be 41751.3±5 cm-1.
Key words:  Photodissociation, Rydberg tagging, Branching ratio, Dissociation energy
FundProject:
HOD分子在?1B1态的光解动力学: 产物OH/OD的分支比以及OD键解离能
程丽娜,程元,袁开军*,郭庆,汪涛,戴东旭,杨学明*
摘要:
利用H(D)原子里德堡态时间飞渡谱技术研究了HOD超声射流分子束在124 nm附近的?态光解动力学.实验测量了HOD分子在?态的转动分辨的吸收谱,并得到了五个转动峰下H+OD以及D+OH通道的产物总的平动能谱.通过对产物平动能谱的分析,得到了?态解离产物OH和OD的分支比,并与Β态和?态相应解离产物的分支比做了对比.实验结果确定了HOD分子OD键的解离能为41751.3±5 cm-1.
关键词:  光解,里德堡态,分支比,解离能
DOI:10.1088/1674-0068/24/02/129-133
分类号: