High-spin yrast and non-yrast bands in 176Os, 178Os and 180Os

摘要: Abstract High-spin yrast and non-yrast states have been identified in 176 Os, 178 Os 180 using ( 16 O , x n) reactions, γ-ray techniques. Band crossing anomalies are observed each of the positive-parity bands. The magnitude these decreases with decreasing neutron number, an effect attributed to change moment inertia ground state rotational A 23 ns isomer, predominantly K π = 7 − is at 1930 keV Os. configuration this isomer discussed on basis properties its band. Negative parity, odd even spin, sideband sequences isotope. Their relationship rotation-aligned octupole 2-quasiparticle bands from their excitation energies, band spacings, decay properties. Detailed calculations for Coriolis mixed carried out likely 2-quasiproton 2-quasineutron configurations. An anomaly spin 17 odd-spin negative-parity sequence a fourquasiparticle configuration.