CF自由基双光子共振增强多光子电离研究:3p Rydberg态的转动分析

Study on the Two-photon Resonance-enhanced Multiphoton Ionization of CF Radicals: Rotational Analysis of 3p Rydberg State

摘要: 利用 \mathrmAr / \mathrmCF_4 、 \mathrmAr / \mathrmCF_2 \mathrmCl_2 或 \mathrmAr / \mathrmCF_3 \mathrmCOOH 混合气体的直流脉冲放电产生 CF 自由基，观测了 260 \sim 360 \mathrm~nm 范围内转动分辨的 CF 自由基双光子共振增强多光子电离谱。分析表明，该段光谱对应于 CF 自由基 3 \mathrmp \pi \mathrmD^2 \Pi_\mathrmr\left(v^\prime=2 \sim 6, r=3 / 2,1 / 2\right) \leftarrow \mathrmX^2 \Pi_\mathrmr\left(v^\prime \prime=0, r=3 / 2,1 / 2\right) 的共振激发。对观测的振动带进行了转动分析，并获得了 3 p 里德堡态的转动常数和自旋 - 轨道分裂值。

Abstract: CF radicals were generated by using a dc discharge in the mixture of Ar/CF₄, Ar/CF₂Cl₂, and Ar/CF₃COOH. The rotationally resolved （2+1） resonance-enhanced multiphoton ionization （REMPI） spectra of CF radical have been investigated in the wavelength range 260 -360nm. The analysis shows that the observed spectra can be assigned as the two-photon resonance excitation 3 \mathrmp \pi \mathrmD^2 \Pi_\mathrmr\left(v^\prime=2 \sim 6, r=3 / 2,1 / 2\right) \leftarrow \mathrmX^2 \Pi_\mathrmr\left(v^\prime \prime=0, r=3 / 2,1 / 2\right) . The related rotational constants and the spin-orbit splitting values of CF 3p Rydberg state have been derived.