Laser spectroscopy and dynamics of the jet-cooled AsH2 free radical
文献类型：期刊论文
| 作者 | He, Sheng-Gui; Clouthier, Dennis J. |
| 刊名 | JOURNAL OF CHEMICAL PHYSICS
 |
| 出版日期 | 2007-04-21 |
| 卷号 | 126期号:15 |
| ISSN号 | 0021-9606 |
| DOI | 10.1063/1.2721544 |
| 英文摘要 | The (A) over tilde (2)A(1)-(X) over tilde B-2(1) electronic transition of the jet-cooled AsH2 free radical has been studied by laser-induced fluorescence (LIF), wavelength-resolved emission, and fluorescence lifetime measurements. The radical was produced by a pulsed electric discharge through a mixture of arsine (AsH3) and high pressure argon at the exit of a pulsed valve. Nine vibronic bands were identified by LIF spectroscopy in the 505-400 nm region, including a long progression in the bending mode and two bands (1(0)(1) and 1(0)(1)2(0)(1)) involving the excited state As-H symmetric stretch. Single vibronic level emission spectra showed similar activity in the bending and symmetric stretching frequencies of the ground state. High-resolution spectra of the 0(0)(0) band exhibited large spin splittings and small, resolved arsenic hyperfine splittings, due to a substantial Fermi contact interaction in the excited state. The rotational constants obtained in the analysis gave effective molecular structures of r(0)(')=1.5183(1) A, theta(')(0)=90.75(1)degrees and r(0)(')=1.4830(1) A, theta(')(0)=123.10(2)degrees. The excited state fluorescence lifetimes vary dramatically with rovibronic state, from a single value of 1.4 mu s to many with lifetimes less than 10 ns, behavior which the authors interpret as signaling the onset of a predissociative process near the zero-point level of the ground state. (c) 2007 American Institute of Physics. |
| 语种 | 英语 |
| WOS记录号 | WOS:000245870900025 |
| 出版者 | AMER INST PHYSICS |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/60657]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | He, Sheng-Gui |
| 作者单位 | 1.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China 2.Univ Kentucky, Dept Chem, Lexington, KY 40506 USA |
| 推荐引用方式 GB/T 7714 | He, Sheng-Gui,Clouthier, Dennis J.. Laser spectroscopy and dynamics of the jet-cooled AsH2 free radical[J]. JOURNAL OF CHEMICAL PHYSICS,2007,126(15). |
| APA | He, Sheng-Gui,&Clouthier, Dennis J..(2007).Laser spectroscopy and dynamics of the jet-cooled AsH2 free radical.JOURNAL OF CHEMICAL PHYSICS,126(15). |
| MLA | He, Sheng-Gui,et al."Laser spectroscopy and dynamics of the jet-cooled AsH2 free radical".JOURNAL OF CHEMICAL PHYSICS 126.15(2007). |
入库方式： OAI收割
来源：化学研究所
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