Isotope Shifts in Nd II by Collinear Fast-Ion-Beam Laser Spectroscopy

Atomic spectra of singly ionized neodymium have been measured by collinear fast-ion- beam laser spectroscopy. The resonant spectra in the lines of 568.9, 570.8, 572.7, and 574.1 nm in Nd II were obtained and the optical shifts were determined. We obtained the optical shifts of all the five even isotopes (142-150) in Nd II. The accuracy of our results was improved by one order of magnitude compared with other published results.