Observation of a mu s isomer in In-134(49)85: Proton-neutron coupling "southeast" of Sn-132(50)82
- Phong, VH
- Lorusso, G
- Davinson, T
- Estrade, A
- Hall, O
- Liu, J
- Matsui, K
- Montes, F
- Nishimura, S
- Boso, A
- Regan, PH
- Shearman, R
- Xu, ZY
- Agramunt, J
- Allmond, JM
- Ahn, DS
- Algora, A
- Baba, H
- Brewer, NT
- Bruno, CG
- Caballero-Folch, R
- Calvino, F
- Wolinska-Cichocka, M
- Cortes, G
- Dillmann, I
- Domingo-Pardo, C
- Gargano, A
- Go, S
- Griffin, CJ
- Grzywacz, RK
- Harkness-Brennan, L
- Isobe, T
- Jungclaus, A
- Kahl, D
- Khiem, LH
- Kiss, G
- Korgul, A
- Kubono, S
- Miernik, K
- Morales, AI
- Nepal, N
- Piersa, M
- Podolyak, Zs
- Rasco, BC
- Rykaczewski, KP
- Sakurai, H
- Shimizu, Y
- Stacener, DW
- Sumikama, T
- Suzuki, H
- Takeda, H
- Tain, JL
- Tarifeno-Saldivia, A
- Tolosa-Delgado, A
- Vaquero, V
- Woods, PJ
- Yokoyama, R
- Yuan, C
DOIAbstract
We report on the observation of a microsecond isomeric state in the single-proton-hole, three-neutron-particle nucleus In134. The nuclei of interest were produced by in-flight fission of a U238 beam at the Radioactive Isotope Beam Factory at RIKEN. The isomer depopulates through a γ ray of energy 56.7(1) keV and with a half-life of T1/2=3.5(4)μs. Based on the comparison with shell-model calculations, we interpret the isomer as the Iπ=5- member of the π0g9/2-1 - ν1f7/23 multiplet, decaying to the Iπ=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 Iπ=5- isomer decay in In132, provides a benchmark of the proton-neutron interaction in the...
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