Electronic transition and cascading decay of CuO molecule in the wavelength region 430-550 nm investigated by laser-induced fluorescence spectroscopy
Electronic transition and cascading decay of CuO molecule in the wavelength region 430-550 nm investigated by laser-induced fluorescence spectroscopy
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激光诱导荧光光谱研究 CuO 分子在 430-550 nm 波长范围内的电子跃迁和级联衰减
DOI：
10.1016/j.jms.2019.05.010
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发表时间：
2019
影响因子：
1.4
通讯作者：
Ma Xinwen
中科院分区：
文献类型：
--
作者：
Xiang Qianlan;Yang Jie;Zhang Shengli;Zhang Jicai;Ma Xinwen
利用激光诱导荧光光谱和单振动能级发射光谱研究了430 ~ 550 nm范围内氧化铜分子的电子能谱。采用超音速射流冷却放电辅助激光烧蚀Cu靶制备CuO分子。22个电子振动的乐队观察并分配给电子从基态转变发展X2Пito激发态C2П3/2,C2П1/2,D2Δ5/2,E2Δ5/2,F2П3/2,G2Σ−,H2П3/2,和I2П3/2,十乐队首先被记录下来。通过光谱旋转分析，得到了63cuo和65cuo同位素物的激发态分子常数。结合时间分辨的单振动能级发射光谱发现了电子激发态中的级联过程。记录并分析了不同衰变过程对应的随时间变化的辐射衰减曲线。
The electronic spectrum of the copper monoxide molecule (CuO) was investigated in the range of 430–550 nm using laser induced fluorescence spectroscopy and single vibronic level emission spectra. The CuO molecule was produced by a supersonic jet-cooled discharge assisted laser ablation of Cu target. Twenty two vibronic bands were observed and assigned to the electronic transition progressions from the ground state X2Пito excited states C2П3/2, C2П1/2, D2Δ5/2, E2Δ5/2, F2П3/2, G2Σ−, H2П3/2, and I2П3/2, of which ten bands were recorded firstly. The molecular constants of the excited electronic states for63CuO and65CuO isotopologues were obtained by a rotational analysis of the spectra. Cascading processes in the electronic excited states were found combining the time-resolved single vibronic level emission spectroscopy. The time-dependent radiative decay curves corresponding to different decay processes were recorded and analyzed.