Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8190957 | Physics Letters B | 2012 | 6 Pages |
Abstract
Deep-inelastic reactions have been used to populate high-spin states in the iridium isotopes. New results include the identification of particularly long-lived three-quasiparticle isomers in 191Ir and 193Ir, with mean-lives of 8.2(7) s and 180(3) μs respectively, decaying into newly identified states of the h11/2 proton bands and into other structures. Spins and parities of JÏ=31/2+ are suggested for both, consistent with coupling of the 11/2â[505] proton to the 10â two-neutron excitations in the cores. These and other configurations are discussed in the context of configuration constrained potential-energy-surface calculations. All calculated intrinsic states are expected to be associated with triaxial shapes and the extreme isomerism observed is attributed to spin-trapping rather than K-hindrance.
Related Topics
Physical Sciences and Engineering
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Nuclear and High Energy Physics
Authors
G.D. Dracoulis, G.J. Lane, A.P. Byrne, H. Watanabe, R.O. Hughes, N. Palalani, F.G. Kondev, M. Carpenter, R.V.F. Janssens, T. Lauritsen, C.J. Lister, D. Seweryniak, S. Zhu, P. Chowdhury, Y. Shi, F.R. Xu,