Hyperfine Structure and Nuclear Spin of Yttrium,3989Y

Abstract

By the use of a liquid-air-cooled hollow-cathode tube with very low current densities it was possible to resolve hyperfine structure in the arc spectrum of yttrium. The value of the nuclear spin was found to be I=½ and the sign of the magnetic moment to be negative. This agrees with recent results of Crawford and Olson, who determined the nuclear spin from the intensity ratio of a hyperfine-structure doublet in the second spark spectrum of yttrium.