This work presents the measurements of the hyperfine structure constants A and B, as well as the isotope shifts, for 26 electronic levels belonging to the even-parity configurations at the energy range 28000–40000 cm${}^{-1}$ in the europium atom. The measurements were performed with the use of laser spectroscopy with a hollow cathode discharge lamp as the source of the atoms and the detection of laser induced fluorescence. Among the results obtained, 10 levels were measured for the first time, in the case of another 3 levels results somewhat more precise than the earlier published ones were obtained. The A and B hyperfine structure constants’ values were determined on the basis of the measurements on 73 spectral lines located in two wavelength ranges: 480–560 nm and 625–680 nm.

这项工作介绍了在能量范围28000–40000 cm内，属于偶数奇偶性配置的26个电子能级的超精细结构常数A和B的测量以及同位素位移。${}^{-\mathrm{1个}}$在the原子中。通过使用以空心阴极放电灯作为原子源的激光光谱法和检测激光诱导的荧光来进行测量。在获得的结果中，首次测量了10个水平，在另外3个水平的情况下，其结果要比以前公布的结果更为精确。在甲和乙超精细结构常数值在位于两个波长范围73条谱线的测量的基础上确定：480-560纳米和625-680纳米。