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题名: [1+1] photodissociation of CS2+((X)over-tilde(2)Pi(g)) via the vibrationally mediated (B)over-tilde(2)Sigma(+)(u) state: Multichannels exhibiting and mode specific dynamics
作者: Li, Jialin1, 2;  Zhang, Cuimei1, 2, 3;  Zhang, Qun1, 2;  Chen, Yang1, 2;  Huang, Cunshun3;  Yang, Xueming3
刊名: JOURNAL OF CHEMICAL PHYSICS
发表日期: 2011-03-21
DOI: 10.1063/1.3567071
卷: 134, 期:11
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
英文摘要: Dissociation dynamics of CS2+ vibrationally mediated via its (B) over tilde (2)Sigma(+)(u) state, was studied using the time-sliced velocity map imaging technique. The parent CS2+ cation was prepared in its (X) over tilde (2)Pi(g) ground state through a [3 + 1] resonance enhanced multiphoton ionization process, via the 4p sigma(3)Pi(u) intermediate Rydberg state of neutral CS2 molecule at 483.14 nm. CS2+ ( (X) over tilde (2)Pi(g)) was dissociated by a [1 + 1] photoexcitation mediated via the vibrationally selected (B) over tilde state over a wavelength range of 267 -283 nm. At these wavelengths the (C) over tilde (2)Sigma(+)(g) and (D) over tilde (2)Sigma(+)(u) states are excited, followed by numerous S+ and CS+ dissociation channels. The S+ channels specified as three distinct regions were shown with vibrationally resolved structures, in contrast to the less-resolved structures being presented in the CS+ channels. The average translational energy releases were obtained, and the S+/CS+ branching ratios with mode specificity were measured. Two types of dissociation mechanisms are proposed. One mechanism is the direct coupling of the (C) over tilde and (D) over tilde states with the repulsive satellite states leading to the fast photofragmentation. The other mechanism is the internal conversion of the (C) over tilde and (D) over tilde states to the (B) over tilde state, followed by the slow fragmentation occurred via the coupling with the repulsive satellite states. (C) 2011 American Institute of Physics. [doi:10.1063/1.3567071]
关键词[WOS]: 2-PHOTON ABSORPTION-SPECTROSCOPY ;  ENHANCED MULTIPHOTON IONIZATION ;  COLLISION-INDUCED DISSOCIATION ;  PULSED-FIELD IONIZATION ;  CARBON-DISULFIDE ;  ELECTRON-IMPACT ;  PHOTOELECTRON-SPECTRUM ;  CS2+ IONS ;  ULTRAVIOLET ;  CATIONS
语种: 英语
WOS记录号: WOS:000288597700021
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142335
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.Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China
2.Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Anhui, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China

Recommended Citation:
Li, Jialin,Zhang, Cuimei,Zhang, Qun,et al. [1+1] photodissociation of CS2+((X)over-tilde(2)Pi(g)) via the vibrationally mediated (B)over-tilde(2)Sigma(+)(u) state: Multichannels exhibiting and mode specific dynamics[J]. JOURNAL OF CHEMICAL PHYSICS,2011,134(11).
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