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Deformation driving intruder orbitals in Kr-77
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1997 (English)In: Physical Review C. Nuclear Physics, ISSN 0556-2813, E-ISSN 1089-490X, Vol. 56, no 2, 772-781 p.Article in journal (Refereed) PublishedText
Abstract [en]

High-spin states in Kr-77 were identified via analysis of prompt gamma-gamma coincidences in the Ni-58(Si-29,2 alpha 2p) 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 alpha=-1/2 band extended to 39/2(+). The negative-parity signature pair was extended to 31/2(-) and 37/2(-). Two new high-lying negative-parity bands were found extending from a state of spin I = 15/2 and energy 2.6 MeV to 17.4 MeV at I = (55/2). 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.

Place, publisher, year, edition, pages
1997. Vol. 56, no 2, 772-781 p.
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Subatomic Physics
URN: urn:nbn:se:kth:diva-178621DOI: 10.1103/PhysRevC.56.772ISI: A1997XR16200023OAI: diva2:878435

NR 20160125

Available from: 2015-12-09 Created: 2015-12-08 Last updated: 2016-01-25Bibliographically approved

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Landulfo, ECederwall, Bo
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