Abstract Two band systems of FeF have been recorded at Doppler-limited linewidths by laser-induced fluorescence. The 330-nm system provided data for three subbands of the (0,0) band of the 6 Π– X 6 Δ system and showed that levels of the 6 Π 5/2 and 6 Π 3/2 components are significantly perturbed. In the 323-nm system, the (0,0) band of the 6 Φ– X 6 Δ system was found to be overlapped by the (1,0) band of the 6 Π– X 6 Δ system. Data were obtained for three subbands of the (1,0) 6 Π– X 6 Δ system and for five subbands of the (0, 0) 6 Φ– X 6 Δ system. This work considerably extends the previous study by Pouilly et al. (B. Pouilly, J. Schamps, D. J. W. Lumley, and R. F. Barrow, J. Phys. B 11 , 2281–2287 (1978)) because it is a higher resolution study with a lower temperature production of FeF by a continuous flow discharge method. The data recorded were combined with millimeter-wave data for FeF in the X 6 Δ state and fitted with an effective Hamiltonian to determine the major parameters for FeF in the X 6 Δ, 6 Π, and 6 Φ electronic levels.

中文翻译：

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FeF 自由基的紫外光谱：分别在 330 和 323 nm 处研究 6Π–X6Δ 和 6Φ–X6Δ 带系统

摘要 激光诱导荧光在多普勒限制的线宽下记录了 FeF 的两个波段系统。330-nm 系统提供了 6 Π– X 6 Δ 系统的 (0,0) 波段的三个子波段的数据，并表明 6 Π 5/2 和 6 Π 3/2 分量的水平受到显着扰动。在 323-nm 系统中，发现 6 Φ– X 6 Δ 系统的 (0,0) 带与 6 Π– X 6 Δ 系统的 (1,0) 带重叠。获得了 (1,0) 6 Π– X 6 Δ 系统的三个子带和 (0, 0) 6 Φ– X 6 Δ 系统的五个子带的数据。这项工作大大扩展了 Pouilly 等人先前的研究。(B. Pouilly, J. Schamps, DJW Lumley, and RF Barrow, J. Phys. B 11 , 2281–2287 (1978)) 因为它是一种分辨率更高的研究，通过连续流放电方法以更低的温度生产 FeF .