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Quantum state-selected photodissociation dynamics of H2O: Two-photon dissociation via the (C)over-tilde electronic state
Yuan, Kaijun1; Cheng, Yuan1; Cheng, Lina1; Guo, Qing1; Dai, Dongxu1; Yang, Xueming1; Dixon, Richard N.2
刊名JOURNAL OF CHEMICAL PHYSICS
2010-10-07
DOI10.1063/1.3487736
133期:13
收录类别SCI
文章类型Article
WOS标题词Science & Technology ; Physical Sciences
类目[WOS]Physics, Atomic, Molecular & Chemical
研究领域[WOS]Physics
关键词[WOS]MULTIPHOTON IONIZATION SPECTROSCOPY ; 121.6 NM ; PREDISSOCIATION-DYNAMICS ; (D)OVER-TILDE STATES ; D2O ; OH ; WATER ; PHOTOFRAGMENTATION ; DISTRIBUTIONS ; FLUORESCENCE
英文摘要The photodissociation dynamics of H2O via the (C) over tilde state by two-photon excitation has been investigated using the H atom Rydberg tagging time-of-flight technique. The rotational resolved action spectrum of the (C) over tilde <-(X) over tilde transition band has been measured. The line widths show a pronounced dependence on the parent rotational excitation in the (C) over tilde state. The quantum state resolved OH product translational energy distributions and angular distributions have also been obtained. By carefully simulating these distributions, quantum state distributions of the OH product as well as the state-resolved angular anisotropy parameters were determined. The experimental results confirm the variation of two competitive predissociation pathways. A heterogeneous predissociation channel is mediated by rotational coupling to the (B) over tilde (1)A(1) state associated with the a-axis (k(a)'), and a homogeneous pathway arises from purely electronic coupling to the (A) over tilde B-1(1) state. We have also obtained the branching ratios of the OH(X) and OH(A) products, and related these to the (C) over tilde ->(A) over tilde and (C) over tilde ->(B) over tilde pathways. The branching ratios display a strong k(a)' dependence. (C) 2010 American Institute of Physics. [doi:10.1063/1.3487736]
语种英语
WOS记录号WOS:000282699800020
引用统计
文献类型期刊论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/142048
专题中国科学院大连化学物理研究所
作者单位1.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China
2.Univ Bristol, Sch Chem, Bristol BS8 1TS, Avon, England
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Yuan, Kaijun,Cheng, Yuan,Cheng, Lina,et al. Quantum state-selected photodissociation dynamics of H2O: Two-photon dissociation via the (C)over-tilde electronic state[J]. JOURNAL OF CHEMICAL PHYSICS,2010,133(13).
APA Yuan, Kaijun.,Cheng, Yuan.,Cheng, Lina.,Guo, Qing.,Dai, Dongxu.,...&Dixon, Richard N..(2010).Quantum state-selected photodissociation dynamics of H2O: Two-photon dissociation via the (C)over-tilde electronic state.JOURNAL OF CHEMICAL PHYSICS,133(13).
MLA Yuan, Kaijun,et al."Quantum state-selected photodissociation dynamics of H2O: Two-photon dissociation via the (C)over-tilde electronic state".JOURNAL OF CHEMICAL PHYSICS 133.13(2010).
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