Changes in mean square nuclear charge radii of Nd II from optical isotope shifts by collinear fast-ion-beam laser spectroscopy

High-resolution collinear fast-ion-beam-laser spectroscopy has been applied to investigate the optical isotope shifts for transition 4f(4) 5d K-6(11/2) - (24445)(11/2)degrees of Nd N. From the measured optical isotope shifts, changes in mean-square nuclear charge radii delta[tau(2)] (fm(2)) among live even-even neodymium isotopes have been deduced: (142, 144) 0.282, (144, 146) 0.242, (146, 143) 0.274, (148, 150) 0.404. The results are in good agreement with experimental data from electronic x-ray spectroscopy and combined optical and x-ray spectroscopy.