激光诱导荧光法测量钆原子光谱

Gadolinium spectra measured by laser induced fluorescence

为了有效地利用同位素研究钆原子的光谱特性。采用原子蒸气束激光诱导荧光法测量钆原子的第一激发态的同位素位移及超精细结构、原子跃迁自发辐射的分支比和原子蒸气束的多普勒宽度。通过对测量结果的分析和计算 ,分别给出钆原子 5条谱线的同位素位移和超精细结构、两个能级 (17795 .2 6 7cm- 1 ,172 2 7.96 9cm- 1 )的寿命 (2 37ns,94 7ns)和光吸收截面 (1.39× 10 - 1 3cm2和 8.77×10 - 1 4cm2 )。这些研究结果为进一步测量钆原子高激发态和电离态的光谱打下基础。

The spectral characteristics of Gd were studied to more effectively use Gd isotopes. The isotope shifts, hyperfine structure, spontaneous emission branch ratio of the first excited level and Doppler width of the atom vapor beam were measured using laser induced fluorescence. Experimental data is given for the isotope shifts and hyperfine structure widths of five spectral lines, and for the lifetimes (237 nm, 947 nm) and absorption cross sections (1.37×10 -13 cm 2, 8.77×10 -14 cm 2) for two en...