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

New high-spin microsecond isomers, with Jπ = (31+) and Jπ = (28-), have been identified in 206Bi at 10 170 and 9233 keV, respectively, using γ-ray coincidence spectroscopy following deep-inelastic reactions with the 76Ge + 208Pb 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. [ABSTRACT FROM AUTHOR]