Northern boundary of the “island of inversion” and triaxiality in 34Si

Northern boundary of the “island of inversion” and triaxiality in 34Si

β-decay studies of neutron-rich nuclei in and around the “island of inversion” have been performed. With a systematic investigation of half-lives for the isotonic chains from N=19 to 22, conspicuous kinks observed at Z=13 provide a clear signature of a boundary on the northern (high-Z) side of the i...

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Bibliographic Details
Main Authors: R. Han, X.Q. Li, W.G. Jiang, Z.H. Li, H. Hua, S.Q. Zhang, C.X. Yuan, D.X. Jiang, Y.L. Ye, J. Li, F.R. Xu, Q.B. Chen, J. Meng, J.S. Wang, C. Xu, Y.L. Sun, C.G. Wang, H.Y. Wu, C.Y. Niu, C.G. Li, C. He, W. Jiang, P.J. Li, H.L. Zang, J. Feng, S.D. Chen, Q. Liu, X.C. Chen, H.S. Xu, Z.G. Hu, Y.Y. Yang, P. Ma, J.B. Ma, S.L. Jin, Z. Bai, M.R. Huang, Y.J. Zhou, W.H. Ma, Y. Li, X.H. Zhou, Y.H. Zhang, G.Q. Xiao, W.L. Zhan
Format: Article
Language:English
Published: Elsevier 2017-09-01
Series:Physics Letters B
Subjects:
Island of inversion
β-decay
Half-life
Triaxiality
Shell model
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269317305543
Description
Summary:β-decay studies of neutron-rich nuclei in and around the “island of inversion” have been performed. With a systematic investigation of half-lives for the isotonic chains from N=19 to 22, conspicuous kinks observed at Z=13 provide a clear signature of a boundary on the northern (high-Z) side of the island. Based on the comparison with shell model calculations using Gogny D1S and SDPF-M interactions, a newly determined 22+ state in 34Si at 4519 keV presents an experimental evidence of triaxiality in this region and sheds more light on the structure of the transition across the northern boundary of the island.
ISSN:0370-2693
1873-2445

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