Deformation driving intruder orbitals in Kr-77
Aug, 1997
9 pages
Published in:
- Phys.Rev.C 56 (1997) 772-781
Citations per year
Abstract: (APS)
High-spin states in 77Kr were identified via analysis of prompt γ-γ coincidences in the 58Ni(29Si,2α2p) reaction at 128 MeV at the Gammasphere facility. Evaporation channel selection was achieved using the 95 element Microball charged-particle detector. 27 new states and 42 new transitions were found. The positive-parity bands were confirmed and the α=−12 band extended to 392+. The negative-parity signature pair was extended to 312− and 372−. Two new high-lying negative-parity bands were found extending from a state of spin I=152 and energy 2.6 MeV to 17.4 MeV at I=(552). The new bands appear highly deformed and become yrast at high spin. A three-quasiparticle structure based on deformation driving, low-K unique-parity and intruder orbitals is suggested for them.- 27.50.+e
- 23.20.Lv
- 21.60.Ev
- 21.10.Re
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