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American Physical Society, Physical Review C, 1(87)

DOI: 10.1103/physrevc.87.014326

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

This paper was not found in any repository, but could be made available legally by the author.
This paper was not found in any repository, but could be made available legally by the author.

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Data provided by SHERPA/RoMEO

Abstract

Deep-inelastic reactions and gamma-ray spectroscopy have been used to study excited states in Au-195. A three-quasiparticle isomer with a mean-life of 18.6(3) mu s has been assigned at 2461 + Delta keV, with decays into newly identified structures. Possible configurations for the isomer are discussed including a J(pi) = 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.