Differences in the isotopic changes in the charge radii of nuclei with 50<(/V,Z)<82
Alkhazov G. D. , Barzakh A. E. , Buyanov N. B. , Denisov V. P. , Ivanov V. S., Letokhov V. S. , Mishin V. I. , Sekatskii S. K., Fedoseev V. N., Chubukov I. Ya.
The isotopic shifts and hyperfine splitting of optical lines have been measured for europium, samarium, and neodymium isotopes with N< 82 neutrons at a laser installation at the IRIS mass-separator of the Leningrad Institute of Nuclear Physics. The isotopic behavior of the charge radii of the nuclei is found to depend critically on the proton number.