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B-X and C-X Band Systems of CuCl Revisited: Laser-induced Fluorescence Study in 465−490 nm
Li Wang, Jun-feng Zhen,, Qun Zhang*, Yang Chen*
Hefei National Laboratory for Physical Sciences at the Microscale, Department of Chemical Physics, University of Science and Technology of China, Hefei 230026, China
Abstract:
We have reinvestigated the B-X and C-X band systems of CuCl by recording the laser-induced fluorescence excitation spectra in 20400?21800 cm?1. The rotational analyses in Hund’s case (a) revealed unambiguously a singlet-to-singlet transition nature. The radiative lifetimes were measured to be 4.670 and 4.667 μs, respectively, which are much longer than that expected for a pure singlet of CuCl. This implies that the fluorescence mechanism in the B or C band systems lies in the mixing of the singlets (1Пand 1+) and triplets (3П0,1,2) and that the two excited states observed in our experiment might be the singlets that have been strongly “contaminated” by their triplet neighbors.
Key words:  CuCl, B state, C state, Laser-induced fluorescence
FundProject:
B-X and C-X Band Systems of CuCl Revisited: Laser-induced Fluorescence Study in 465−490 nm
王莉, 甄军锋, 张群*, 陈旸*
合肥微尺度物质科学国家实验室,中国科技大学化学物理系,合肥230026
摘要:
通过20400~21800 cm-1的激光诱导荧光激发谱,重新研究了CuCl的BXCX带系,洪特情形(a)的转动分析揭示出明显的单重态到单重态的跃迁特征. 测量的寿命(分别为4.670和4.667 μs)对于纯的单重态明显太长, 表明CuCl的B态和C态应该位于单重态(1П和1+)和三重态(3П0,1,2)的混合区,光谱所观测到的这两个激发态可能是被临近三重态严重微扰的单重态.
关键词:  CuCl,B态,C态,激光诱导荧光
DOI:10.1088/1674-0068/23/03/249-251
分类号: