Isomeric and β -decay spectroscopy of Ho 173,174

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

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β-decay spectroscopy of Ho173,174 (Z = 67, N = 106,107) was conducted at Radioactive Isotope Beam Factory at RIKEN by using in-flight fission of a 345-MeV/u U238 primary beam. A previously unreported isomeric state at 405 keV with half-life of 3.7(12) μs and a spin and parity of (3/2+) is identified in Ho173. Moreover, a new state with a spin and parity of 9- was discovered in Er174. The experimental log ft values of 5.84(20) and 5.25(18) suggest an allowed-hindered β decay from the ground state of Ho174 to the Kπ=8- isomeric state in Er174. Configuration-constrained potential energy surface (PES) calculations were performed and the predictions are in reasonable agreement with the experimental results.

Original languageEnglish
Article number024301
JournalPhysical Review C
Issue number2
StatePublished - Aug 2020


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