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VOLUME 37 (1983) | ISSUE 5 | PAGE 231
Measurement of isotropic variations in the charge radii of europium nuclei by the method of three-stepped laser photoionization of atoms
The optical isotopic shifts in atomic spectra are measured for the first time using the method of laser multistep photoionization of atoms and the changes in the mean-square charge radii of radioactive nuclei are determined. The measurements were performed for the radioactive isotopes 145_149Eu in the transition 4/7 6s2 8S °/2 -4/7 6s 6p 6P7/2, λ 576.5 nm.