High-K negative parity states in 184Os

Abstract

High-spin states in 184Os have been studied using the 170Er(18O,4n) reaction at a beam energy of 85 MeV. Several new negative parity levels including a 48-ns Kπ = (18-) isomer have been identified. Nilsson configurations for the levels are assigned by comparison with multiquasiparticle calculations, Potential-energy-surface calculations show an increasing influence of triaxiality in nuclear shapes at higher spins. The decay rate of the Kπ = (18-) isomer is discussed in relation to the role of the K quantum number.