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题名: Photofragment translational spectroscopy of CH3I at 225 nm-with the high excitation of the symmetric stretch vibration of CH3 fragment
作者: Hu, Lili1, 2;  Zhou, Zhimin1, 2;  Dong, Changwu1, 2;  Zhang, Lijuan1, 2;  Du, Yikui1;  Cheng, Min1;  Zhu, Qihe1
关键词: electron impact excitation ;  molecule-photon collisions ;  organic compounds ;  photodissociation ;  time of flight spectra ;  vibrational states
刊名: JOURNAL OF CHEMICAL PHYSICS
发表日期: 2012-10-14
DOI: 10.1063/1.4757019
卷: 137, 期:14
收录类别: SCI
文章类型: Article
类目[WOS]: Physics, Atomic, Molecular & Chemical
研究领域[WOS]: Physics
英文摘要: The photodissociation dynamics of CH3I at 225 nm is studied on our high resolution mini-TOF photofragment translational spectrometer. The photofragment translational spectra of the I* and the I channels via parallel (parallel to) and perpendicular (perpendicular to) transitions, i.e., of the four pathways (3)Q(0), (3)Q(0) <- (1)Q(1), (1)Q(1), and (1)Q(1) <- (3)Q(0), are obtained with both the symmetric stretch (nu(1)) and the umbrella (nu(2)) vibrational modes of the CH3 fragments partially resolved. The strong excitation of the symmetric stretch mode (nu(1)) is revealed in both the I and the I* channels. The branching fractions for the four pathways (0.09 for (3)Q(0), 0.03 for (3)Q(0) <- (1)Q(1), 0.34 for (1)Q(1), and 0.54 for (1)Q(1) <- (3)Q(0)) show that the parallel transition ((3)Q(0) <- X) is the major and the I channel is dominant in the photodissociation of CH3I at 225 nm. The curve-crossing probability is found to be 0.86 for (1)Q(1) <- (3)Q(0) but 0.08 for (3)Q(0) <- (1)Q(1). (C) 2012 American Institute of Physics. [http://dx.doi.org/10.1063/1.4757019]
关键词[WOS]: METHYL-IODIDE PHOTODISSOCIATION ;  DIODE-LASER ;  266-NM PHOTODISSOCIATION ;  EMISSION-SPECTROSCOPY ;  RAMAN-SPECTROSCOPY ;  PROPYL IODIDES ;  UMBRELLA MODE ;  DYNAMICS ;  ENERGY ;  BAND
语种: 英语
WOS记录号: WOS:000310302800013
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142885
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, Inst Chem, Natl Lab Mol Sci, State Key Lab Mol React Dynam, Beijing 100190, Peoples R China
2.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China

Recommended Citation:
Hu, Lili,Zhou, Zhimin,Dong, Changwu,et al. Photofragment translational spectroscopy of CH3I at 225 nm-with the high excitation of the symmetric stretch vibration of CH3 fragment[J]. JOURNAL OF CHEMICAL PHYSICS,2012,137(14).
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