Sidebands and high-spin states in 182Os

High-spin rotational states in 182Os have been studied using singles and coincidence γ-ray techniques and the 170Er(16O, 4n) reaction. The yrast sequence of states has been extended to spin 24+ and 7 sidebands identified. These are the γ-vibrational and K = 3− octupole bands and five two-quasiparticle bands including the K = 8−(τ = 1.1 ms) isomer band. The octupole vibrational band is rotation aligned and may also mix with two-quasiparticle configurations involving an i 13 2 neutron or an h 9 2 proton orbit. The bands with K = 5(−) and 8− also involve an i 13 2 neutron and have high apparent moments of inertia. As well as the ( i 13 2 ) 2 s-band, two other rotation aligned positive-parity bands are observed and they are suggested to be the yrare ( i 13 2 ) 2 neutron bands. The bands are characterized in terms of their most probable Nilsson configurations. The level scheme of 181Os was reinvestigated and the i 13 2 neutron band extended to spin 49 2 + .