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题名: Rotational State Specific Dissociation Dynamics of HOD -> H plus OD via Two-Photon Excitation to the (C)over-tilde Electronic State
作者: Cheng, Lina1;  Yuan, Kaijun1;  Cheng, Yuan1;  Guo, Qing1;  Wang, Tao1;  Dai, Dongxu1;  Yang, Xueming1
刊名: JOURNAL OF PHYSICAL CHEMISTRY A
发表日期: 2011-03-10
DOI: 10.1021/jp109169f
卷: 115, 期:9, 页:1500-1507
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical ;  Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Chemistry ;  Physics
英文摘要: The dissociation dynamics of HOD via two-photon excitation to the (C) over tilde state have been investigated using the H-atom Rydberg tagging time-of-flight (TOF) technique. The H-atom action spectrum for the C <- (X) over tilde transition shows resolved rotational structure. Product translational energy distributions and angular distributions have also been recorded for the H + OD channel for, three excited levels each with K-a = 2. From these distributions, quantum state distributions and angular anisotropy parameters (beta(2) and beta(4)) for the OD product were determined. These results are consistent with the nonadiabatic predissociation picture illustrated in the one-photon dissociation process for H2O. The heterogeneous dissociation pathway via Coriolis coupling is the dominant dissociation process in the present study. A high proportion of the total available energy is deposited into the rotational energy of the OD product. The anisotropic recoil distributions reveal the distinctive contributions from the alignment of the excited states and the dissociation process. Comparisons are also made between the results for HOD and H2O via the equivalent rotational transitions. The OH bond energy, D-o(H-OD), of the HOD molecule is also determined to be 41283.0 +/- 5 cm(-1).
关键词[WOS]: MULTIPHOTON IONIZATION SPECTROSCOPY ;  PHOTODISSOCIATION DYNAMICS ;  121.6 NM ;  MOLECULAR PREDISSOCIATION ;  H2O ;  WATER ;  D2O ;  PHOTOFRAGMENTATION ;  BOND ;  DISTRIBUTIONS
语种: 英语
WOS记录号: WOS:000287832900006
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142630
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Dalian Inst Chem Phys, State key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Cheng, Lina,Yuan, Kaijun,Cheng, Yuan,et al. Rotational State Specific Dissociation Dynamics of HOD -> H plus OD via Two-Photon Excitation to the (C)over-tilde Electronic State[J]. JOURNAL OF PHYSICAL CHEMISTRY A,2011,115(9):1500-1507.
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