Spins of198Au levels from the (n, ?) reaction using polarized neutrons and polarized197Au nuclei

Abstract

The 197Au(n,?) reaction was studied with the aid of polarized thermal neutron beams. Two kinds of experimental data were obtained: i) circular polarization of gamma rays of high energy due to capture of polarized neutrons by unoriented 197Au nuclei, and ii) angular distribution of such gamma rays observed after capture of polarized neutrons by polarized 197Au nuclei. Spins of several levels of 198Au could be uniquely assigned or could be restricted. The sign of the hyperfine field of Au in AuFe has been determined to be negative.