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Decay and Fission Hindrance of Two- and Four-Quasiparticle K Isomers in (254)Rf

David, Huang M.; Chen, J.; Seweryniak, D.; Kondev, Filip G.; Gates, Jacklyn M.; Gregorich, Kenneth E.; Ahmad, I.; Albers, Mark; Alcorta, Martin; Back, B.; Baartman, Brendan; Bertone, P. F.; Bernstein, L.; Campbell, C. M.; Carpenter, M. P.; Chiara, C. J.; Clark, R. M.; Cromaz, M.; Doherty, D. T.; Dracoulis, George; Esker, N. E.; Fallon, P; Gothe, Oliver R; Greene, J.P.; Greenlees, P T; Hartley, D J; Hauschild, K; Hoffman, C R; Hota, Sankha; Janssens, R V F; Khoo, T; Konki, J; Kwarsick, J. T; Lauritsen, T; Macchiavelli, A O; Mudder, P. R; Nair, Chithra K Shashidharan; Qui, Y; Rissanen, Juho; Rogers, Andrew M; Ruotsalainen, P.; Savard, Guy; Stolze, S; Weins, Andreas; Zhu, S.


Two isomers decaying by electromagnetic transitions with half-lives of 4.7(1.1) and 247(73)μs have been discovered in the heavy Rf254 nucleus. The observation of the shorter-lived isomer was made possible by a novel application of a digital data acquisition system. The isomers were interpreted as the Kπ=8-, ν2(7/2+[624],9/2-[734]) two-quasineutron and the Kπ=16+, 8-ν2(7/2+[624],9/2-[734])⊗ - 8-π2(7/2-[514],9/2+[624]) four-quasiparticle configurations, respectively. Surprisingly, the lifetime of...[Show more]

CollectionsANU Research Publications
Date published: 2015
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.115.132502
Access Rights: Open Access


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