Hyperfine interactions of short-lived beta-emitter Li-8 in ferromagnetic Ni

Hyperfine interactions of Li-8 impurity nucleus imbedded in ferromagnetic N i metal were studied using the beta-NMR technique. Two kinds of hyperfine f ields B-hf were found, corresponding to two different final sites of Li ato ms in the Ni lattice. The nuclear spin-lattice relaxation times T-1 of Li-8 in Ni were also determined for each field. Temperature dependencies of B-h f and T-1 were observed to deduce these values at T = 0 K that can be compa red with those calculated recently by Akai et al.