Three-quasiparticle isomers and possible deformation in the transitional nuclide, 195Au

Abstract

Deep-inelastic reactions and γ-ray spectroscopy have been used to study excited states in 195Au. A three-quasiparticle isomer with a mean-life of 18.6(3) μs has been assigned at 2461+Δ keV, with decays into newly identified structures. Possible configurations for the isomer are discussed including a Jπ =31/2- intrinsic state produced by coupling the 11/2-[505] proton hole to the 10+ state obtained from the 9/2+[624],11/2+[615] two-neutron holes, expected from configuration-constrained potential-energy-surface calculations. Residual interactions are evaluated within a semi-empirical shell model basis. New lifetime information is also obtained for the 21/2+ and 25/2 + states at 1813 and 1980 keV. The relationship between these and other newly identified states and the negative-parity states in the even-even neighbors is discussed

    Similar works