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题名: The v-v energy transfer of highly vibrationally excited states (I) - Vibrational quenching of CO(v) by CO2
作者: Wang, BS;  Gu, YS;  He, Y;  Kong, FA
关键词: time-resolved IR spectrum ;  highly vibrational excited state ;  vibrational energy transfer
刊名: CHINESE SCIENCE BULLETIN
发表日期: 1998-09-01
卷: 43, 期:18, 页:1536-1541
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology
类目[WOS]: Multidisciplinary Sciences
研究领域[WOS]: Science & Technology - Other Topics
英文摘要: The relaxation of the highly vibrationally excited CO (v = 1-8) by CO2 is studied by time-resolved Fourier transform infrared emission spectroscopy (TR FTIR). 193 nm laser photolysis of the mixture of CHBr3 with O-2 generates the highly vibrationally excited CO(v) molecules. TR FTIR records the intense infrared emission of CO(v-->v - I). The vibrational populations of each level of CO(v) have been determined by the method of spectral simulation. Based on the evolution of the time resolved populations and the differential method, 8 energy transfer rate constants of CO (v = 1-8) to CO2 molecules are obtained: (5.7 +/- 0.1), (5.9 +/- 0.1), (5.2 +/- 0.2), (3.4 +/- 0.2), (2.4 +/- 0.3), (2.2 +/- 0.4), (2.0 +/- 0.4) and (1.8 +/- 0.6) (10(-14) cm(3).molecule(-1).s(-1)), respectively. A two-channel energy transfer model can explain the feature of the quenching of CO(v) by CO2. For the lower vibrational states of CO, the vibrational energy transfers preferentially to the upsilon(3) mode of CO2. For the higher levels, the major quenching channel changes to the vibrational energy exchange between CO(v-->v - 1) and the upsilon(1) mode of CO2.
关键词[WOS]: RATES ;  N2O
语种: 英语
WOS记录号: WOS:000076896600008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/138194
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.Shandong Univ, Dept Chem, Jinan 250100, Peoples R China
2.Inst Chem, State Key Lab Mol React Dynam, Beijing 100080, Peoples R China

Recommended Citation:
Wang, BS,Gu, YS,He, Y,et al. The v-v energy transfer of highly vibrationally excited states (I) - Vibrational quenching of CO(v) by CO2[J]. CHINESE SCIENCE BULLETIN,1998,43(18):1536-1541.
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