J.Phys.(London) B14, L135 (1981)

R.New, J.A.R.Griffith, G.R.Isaak, M.P.Ralls

J Dependence of the Field and Mass Isotope Shifts in the Ground Term of Sm I

ATOMIC PHYSICS ^{144,148,150,152,154}Sm; measured optical isotope shifts; deduced separated field, mass contributions to J dependence. Laser heterodyne spectroscopy.