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Yrast structure of 206 Bi: Isomeric states and one-proton-particle, three-neutron-hole excitations

2012; American Institute of Physics; Volume: 86; Issue: 5 Linguagem: Inglês

10.1103/physrevc.86.054322

1538-4497

N. Cieplicka, K. H. Maier, B. Fornal, B. Szpak, R. V. F. Janssens, M. Alcorta, R. Broda, M. P. Carpenter, C. J. Chiara, C. R. Hoffman, B. P. Kay, F. G. Kondev, W. Królas, T. Lauritsen, C. J. Lister, E. A. McCutchan, T. Pawłat, A. M. Rogers, D. Seweryniak, Nicholas Sharp, W. B. Walters, J. Wrzesiński, S. Zhu,

Quantum Chromodynamics and Particle Interactions

New high-spin microsecond isomers, with ${J}^{\ensuremath{\pi}}=({31}^{+})$ and ${J}^{\ensuremath{\pi}}=({28}^{\ensuremath{-}})$, have been identified in ${}^{206}$Bi at 10 170 and 9233 keV, respectively, using $\ensuremath{\gamma}$-ray coincidence spectroscopy following deep-inelastic reactions with the ${}^{76}\mathrm{Ge}+{}^{208}\mathrm{Pb}$ system. Yrast and near-yrast levels populated in the decay of these isomers have been located and interpreted with the help of shell-model calculations. The states identified at energies up to approximately 7 MeV can be described well in terms of one-proton-particle, three-neutron-hole couplings.