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β -delayed γ -ray spectroscopy of non-yrast states in Te 138 near the neutron drip line

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Title
β -delayed γ -ray spectroscopy of non-yrast states in Te 138 near the neutron drip line
Author(s)
Lee, P.; Moon, C.-B.; Lee, C.S.; Odahara, A.; Lozeva, R.; Yagi, A.; Nishimura, S.; Doornenbal, P.; Lorusso, G.; Söderström, P.-A.; Sumikama, T.; Watanabe, H.; Isobe, T.; Baba, H.; Sakurai, H.; Browne, F.; Daido, R.; Fang, Y.; Nishibata, H.; Patel, Z.; Rice, S.; Sinclair, L.; Wu, J.; Xu, Z.Y.; Yokoyama, R.; Kubo, T.; Inabe, N.; Suzuki, H.; Fukuda, N.; Kameda, D.; Takeda, H.; Ahn, D.S.; Murai, D.; Bello Garrote, F.L.; Daugas, J.M.; Didierjean, F.; Ideguchi, E.; Ishigaki, T.; Jung, H.S.; T. Komatsubara; Y. K. Kwon; Morimoto, S.; Niikura, M.; Nishizuka, I.; K. Tshoo
Publication Date
2015-10
Journal
PHYSICAL REVIEW C, v.92, no.4, pp.044320-1 - 044320-7
Publisher
AMER PHYSICAL SOC
Abstract
We report on the first β-decay data of Sb138 to Te138 isotopes beyond the doubly magic Sn132. The parent nucleus was produced by the in-flight fission of a U238 beam on a Be9 target at 345 MeV per nucleon and measured at the BigRIPS separator of the Radioactive Isotope Beam Factory at RIKEN. By using advanced β-γ spectroscopy techniques, the half-life and the tentative spin-parity of Sb138 were measured to be 346(19) ms and (3-), respectively. In addition, we observed several low-lying non-yrast states in Te138 for the first time. Our data allowed us to rearrange the positions of the first 2+ and 4+ states in this nucleus and to construct the level scheme of Te138 in accordance with shell-model calculations. Additionally, we extend energy systematics of Te isotopes within neutron numbers 54 and 86. © 2015 American Physical Society. ©2015 American Physical Society
URI
http://pr.ibs.re.kr/handle/8788114/2915
DOI
10.1103/PhysRevC.92.044320
ISSN
0556-2813
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