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- W758782008 abstract " High spin states in 80 Sr have been studied using the techniques of in-beam γ-ray spectroscopy. The reaction used was 54 Fe( 29 Si, 2 pn ) 80 Sr at beam energies between 85 and 110 MeV. γ-γ coincidence measurements were performed with a thin target to investigate the level structure. Both neutron gated and singles angular distribution measurements were carried out to aid in the assignment of level spins. The directional correlation ratios extracted from the γ-γ coincidence data provided a consistency check for the spin assignments. Level lifetimes were measured by the Doppler shift attenuation method in a thick target γ-γ coincidence measurement. The ground state band has been identified up to (26 + ) and three previously unobserved sidebands have been discovered. The deduced level scheme is compared with cranking model calculations; the predicted transformation to mostly non-collective excitations of an oblate shape is not observed experimentally. The behaviour of the J (1) and J (2) moments of inertia is discussed and presented as evidence for either static or dynamic γ-deformation in the light Sr isotopes. In addition, the level structure is compared with IBM-2 calculations. These calculations indicate the importance of proton excitations across the Z=40 subshell gap, into the g 9/2 orbital, and suggest that the lowest lying 80 Sr sideband can be identified with the collective IBM-2 quasi-γ band. NUCLEAR REACTIONS 54 Fe( 29 Si, 2 pn ), ,em>E = 85 - 110 MeV; measured E γ, I γ(θ), γ-γ, n-γ coincidences, DCO ratios, Doppler shifted γ-ray lineshapes. 80 Sr deduced levels, J, π, τ. Enriched target, Ge(Li), Ge, NE213 detectors." @default.
- W758782008 created "2016-06-24" @default.
- W758782008 creator A5038568677 @default.
- W758782008 date "1986-01-01" @default.
- W758782008 modified "2023-09-25" @default.
- W758782008 title "Spectroscopic study of ⁸⁰Sr" @default.
- W758782008 hasPublicationYear "1986" @default.
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