In the present work the experimentally determined values of Landé $g_J$ factors for 20 odd-parity electronic levels of atomic terbium are presented. The Zeeman splitting of the hyperfine structure was investigated using the method of laser induced fluorescence in a hollow cathode discharge lamp in a constant magnetic field. All of the values were determined for the first time, by the analysis of 32 spectral lines, recorded in the spectral range between 492 and 609 nm. Moreover, the $g_J$ factors for 15 even-parity energy levels, reported in the available literature, were verified.

中文翻译：

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激光光谱测定铽原子奇宇称电子能级的Landé gJ因子

在目前的工作中，Landé 的实验确定值$G_{Ĵ}$给出了原子铽的 20 个奇宇称电子能级的因子。采用激光诱导荧光的方法在恒定磁场中的空心阴极放电灯中研究了超精细结构的塞曼分裂。通过分析 492 至 609 nm 光谱范围内记录的 32 条谱线，首次确定了所有值。此外，$G_{Ĵ}$验证了现有文献中报道的 15 个偶均等能级的因子。