通过 B̃((1)A1) 电子态的 HOD 光解离动力学

Photodissociation dynamics of HOD via the B̃ ((1)A1) electronic state.

作者信息

Su Shu, Wang Hongzhen, Chen Zhichao, Yu Shengrui, Dai Dongxu, Yuan Kaijun, Yang Xueming

机构信息

State Key Laboratory of Molecular Reaction Dynamics, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.

出版信息

J Chem Phys. 2015 Nov 14;143(18):184302. doi: 10.1063/1.4935170.

DOI:10.1063/1.4935170

PMID:26567657

Abstract

Photodissociation dynamics of HOD from the B̃ state has been studied using H/D atom Rydberg "tagging" time-of-flight technique. Both the OD + H and OH + D channels have been investigated. Product kinetic energy distributions, internal state distributions of the OD/OH product, as well as the OD/OH quantum state specific angular anisotropy parameters have been determined. Overall, the photodissociation dynamics of HOD via the B̃ state is qualitatively similar to that of the H2O and D2O, with quantitative differences arising probably from the change in masses. At different photolysis energies, similar rovibrational distributions and state-resolved angular distributions have been observed for the OH/OD(X) product, while remarkable differences have been observed in the rovibrational distributions and state-resolved angular distributions of the OH/OD(A) product.

摘要

利用氢/氘原子里德堡“标记”飞行时间技术研究了HOD从B̃态的光解离动力学。对OD + H和OH + D两个通道都进行了研究。确定了产物动能分布、OD/OH产物的内态分布以及OD/OH量子态特定角向各向异性参数。总体而言，HOD通过B̃态的光解离动力学在定性上与H2O和D2O相似，定量差异可能源于质量的变化。在不同的光解能量下，观察到OH/OD(X)产物具有相似的振转分布和态分辨角分布，而OH/OD(A)产物的振转分布和态分辨角分布则有显著差异。