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题名: Dissociation dynamics of CH3I in electric spark induced breakdown revealed by time-resolved laser induced breakdown spectroscopy
作者: Wang, Yang1;  Liu, Wei-long1;  Song, Yun-fei1;  Duo, Li-ping2;  Liu, Yu-qiang1;  Yang, Yan-qiang1, 3
关键词: Laser-induced breakdown spectroscopy ;  Electric spark induced breakdown ;  Dissociation dynamics ;  Methyl iodide ;  Emission band of I-2
刊名: CHEMICAL PHYSICS
发表日期: 2015-02-02
DOI: 10.1016/j.chemphys.2014.11.024
卷: 447, 页:30-35
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 electric discharge spark dissociation of gas CH3I is found to be similar to its femtosecond laser photodissociation. The almost identical spectra of the two processes show that their initial ionization conditions are very similar. The initial ionization followed by molecular fragmentation is proposed as the dissociation mechanism, in which the characteristic emissions of I+, CH3, CH2, CH, H, and I-2 are identified as the dissociation products. The emission band of 505 nm I-2 is clearly observed in the time-resolved laser induced breakdown spectroscopy (LIBS). The dynamic curve indicates that I-2* molecules are formed after the delay time of similar to 4.7 ns. The formation of I-2* molecule results from the bimolecular collision of the highly excited iodine atom I*(P-4) and CH3I molecule. This dynamical information can help understand the process of electric discharge spark dissociation of CH3I. (C) 2014 Elsevier B.V. All rights reserved.
关键词[WOS]: MASS-SPECTROMETRY ;  METHYL-IODIDE ;  NM ;  PHOTODISSOCIATION ;  PICOSECOND ;  PHOTOLYSIS
语种: 英语
WOS记录号: WOS:000349085300005
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/145963
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.Harbin Inst Technol, Dept Phys, Harbin 150001, Peoples R China
2.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
3.China Acad Engn Phys, Inst Fluid Phys, Natl Key Lab Shock Wave & Detonat Phys, Mianyang 621900, Sichuan, Peoples R China

Recommended Citation:
Wang, Yang,Liu, Wei-long,Song, Yun-fei,et al. Dissociation dynamics of CH3I in electric spark induced breakdown revealed by time-resolved laser induced breakdown spectroscopy[J]. CHEMICAL PHYSICS,2015,447:30-35.
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