High- negative parity states in Os

Shizuma, Toshiyuki; Stevenson, P. D.*; Walker, P. M.*; Toh, Yosuke; Hayakawa, Takehito; Oshima, Masumi; Furuno, Kohei*; Komatsubara, Tetsuro*

Physical Review C, 65(6), p.064310_1 - 064310_12, 2002/06

https://doi.org/10.1103/PhysRevC.65.064310

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