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Long-lived K isomer and enhanced γ vibration in the neutron-rich nucleus ¹⁷²Dy: Collectivity beyond double midshell

Watanabe, H.; Zhang, G.X.; Yoshida, K.; Walker, P.M.; Liu, J.J.; Wu, J.; Regan, P.H.; Söderström, P.-A.; Kanaoka, H.; Korkulu, Z.; Lee, P.S.; Nishimura, S.; Yagi, A.; Ahn, D.S.; Alharbi, T.; Baba, H.; Browne, F.; Bruce, A M; Carroll, R.J.; Chae, K.Y.; Dombradi, Zs.; Doornenbal, P.; Estrade, A.; Fukuda, N.; Griffin, C.; Ideguchi, E.; Inabe, N.; Isobe, T.; Kanaya, S.; Kojouharov, I.; Kondev, F.G.; Kubo, T.; Kubono, S.; Kurz, N.; Kuti, I.; Lalkovski, S.; Lane, G.J.; Lee, C.S.; Lee, E.J.; Lorusso, G.; Lotay, G.; Moon, C.-B.; Nishizuka, I.; Nita, C.R.; Odahara, A.; Patel, Z.; Phong, V.H.; Podolyák, Zs.; Roberts, O.J.; Sakurai, H.; Schaffner, H.; Shand, C.M.; Shimizu, Y.; Sumikama, T.; Suzuki, H.; Takeda, H.; Terashima, S.; Vajta, Zs.; Valiente-Dóbon, J.J.; Xu, Z.Y.


The level structure of 172 Dy has been investigated for the first time by means of decay spectroscopy following in-flight fission of a 238 U beam. A long-lived isomeric state with T1/2=0.71(5) s and Kπ=8− has been identified at 1278 keV, which decays to the ground-state and γ -vibrational bands through hindered electromagnetic transitions, as well as to the daughter nucleus 172 Ho via allowed β decays. The robust nature of the Kπ=8− isomer and the ground-state rotational band reveals an...[Show more]

CollectionsANU Research Publications
Date published: 2016-08-31
Type: Journal article
Source: Physics letters B
DOI: 10.1016/j.physletb.2016.07.057
Access Rights: Open Access


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