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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
引用本文:程丽娜,程元,袁开军,郭庆,汪涛,戴东旭,杨学明.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[J].化学物理学报,2011,24(2):129-133.
作者姓名:程丽娜  程元  袁开军  郭庆  汪涛  戴东旭  杨学明
作者单位: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;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;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;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;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;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;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: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
收稿时间:2010/10/6 0:00:00

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 and Xue-ming Yang.Photodissociation of HOD via the Ĉ1B1 State: OD/OH Branching Ratio and OD Bond Dissociation Energy[J].Chinese Journal of Chemical Physics,2011,24(2):129-133.
Authors:Li-na Cheng  Yuan Cheng  Kai-jun Yuan  Qing Guo  Tao Wang  Dong-xu Dai and Xue-ming Yang
Affiliation:State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China;State key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
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.
Keywords:Photodissociation  Rydberg tagging  Branching ratio  Dissociation energy
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