Changes of the Nuclear Charge Distribution of Nd from OpticalIsotope Shifts

The isotope shifts and hyperfine structures of seven optical transitions for all seven stable isotopes of Nd II were measured by using collinear fast-ion-beam laser spectroscopy. The nuclear parameter λ was obtained from the measured optical isotope shifts for all seven stable isotopes with improved accuracy. The λ values were analysed by using the Fermi distribution for the nuclear charge density. The values of δ< r² >, δ< r⁴ > and δ< r⁶ > were determined.