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Title

Observation of a mu s isomer in In-134(49)85: Proton-neutron coupling >southeast> of Sn-132(50)82

AuthorsPhong, V. H.; Lorusso, G.; Davinson, T.; Estrade, A.; Hall, O.; Liu, J.; Matsui, K.; Montes, F.; Nishimura, S.; Boso, A.; Regan, P. H.; Shearman, R.; Xu, Z. Y.; Agramunt, Jorge ; Allmond, J. M.; Ahn, D. S.; Algora, Alejandro ; Baba, H.; Brewer, N. T.; Bruno, C. G.; Caballero-Folch, R.; Calvino, F.; Wolinska-Cichocka, M.; Cortes, G.; Dillmann, I.; Domingo Pardo, César ; Gargano, A.; Go, S.; Griffin, C. J.; Grzywacz, R. K.; Harkness-Brennan, L.; Isobe, T.; Jungclaus, Andrea ; Kahl, D.; Khiem, L. H.; Kiss, G.; Korgul, A.; Kubono, S.; Miernik, K.; Morales, Ana Isabel ; Nepal, N.; Piersa, M.; Podolyák, Zs.; Rasco, B. C.; Rykaczewski K. P.; Sakurai, H.; Shimizu, Y.; Stacener, D. W.; Sumikama, T.; Suzuki, H.; Takeda, H.; Taín, José Luis ; Tarifeño-Saldivia, A.; Tolosa-Delgado, A.; Vaquero, Victor ; Woods, P. J.; Yokoyama, R.; Yuan, C.
Issue Date29-Jul-2019
PublisherAmerican Physical Society
CitationPhysical Review C 100: 011302 (2019)
AbstractWe report on the observation of a microsecond isomeric state in the single-proton-hole, three-neutron-particle nucleus In-134. The nuclei of interest were produced by in-flight fission of a U-238 beam at the Radioactive Isotope Beam Factory at RIKEN. The isomer depopulates through a gamma ray of energy 56.7(1) keV and with a half-life of T-1/2 = 3.5(4) mu s. Based on the comparison with shell-model calculations, we interpret the isomer as the I-pi = 5(-) member of the pi 0g(9/2)(-1) circle times nu 1f(7/2)(3) multiplet, decaying to the I-pi = 7(-) ground state with a reduced-transition probability of B(E2; 5(-) -> 7(-)) = 0.53(6) W.u. Observation of this isomer, and lack of evidence in the current work for a I-pi = 5(-) isomer decay in In-132, provides a benchmark of the proton-neutron interaction in the region of the nuclear chart >southeast> of Sn-132, where experimental information on excited states is sparse.
Description6 pags., 4 figs., 1 tab.
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevC.100.011302
URIhttp://hdl.handle.net/10261/205485
Identifiersdoi: 10.1103/PhysRevC.100.011302
issn: 2469-9985
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