Academic Journal
Long-lived K isomer and enhanced γ vibration in the neutron-rich nucleus 172Dy: Collectivity beyond double midshell
| Title: | Long-lived K isomer and enhanced γ vibration in the neutron-rich nucleus 172Dy: Collectivity beyond double midshell |
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| Authors: | H. Watanabe, G.X. Zhang, K. Yoshida, P.M. Walker, J.J. Liu, J. Wu, P.H. Regan, P.-A. Söderström, H. Kanaoka, Z. Korkulu, P.S. Lee, S. Nishimura, A. Yagi, D.S. Ahn, T. Alharbi, H. Baba, F. Browne, A.M. Bruce, R.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-Dóbon, Z.Y. Xu |
| Source: | Physics Letters B, Vol 760, Iss C, Pp 641-646 (2016) |
| Publisher Information: | Elsevier, 2016. |
| Publication Year: | 2016 |
| Collection: | LCC:Physics |
| Subject Terms: | 172Dy, K isomer, Decay spectroscopy, Axial symmetry, γ vibration, Physics, QC1-999 |
| More Details: | The level structure of 172Dy has been investigated for the first time by means of decay spectroscopy following in-flight fission of a 238U 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 172Ho via allowed β decays. The robust nature of the Kπ=8− isomer and the ground-state rotational band reveals an axially-symmetric structure for this nucleus. Meanwhile, the γ-vibrational levels have been identified at unusually low excitation energy compared to the neighboring well-deformed nuclei, indicating the significance of the microscopic effect on the non-axial collectivity in this doubly mid-shell region. The underlying mechanism of enhanced γ vibration is discussed in comparison with the deformed Quasiparticle Random-Phase Approximation based on a Skyrme energy-density functional. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 0370-2693 1873-2445 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S0370269316303987; https://doaj.org/toc/0370-2693; https://doaj.org/toc/1873-2445 |
| DOI: | 10.1016/j.physletb.2016.07.057 |
| Access URL: | https://doaj.org/article/b949e37d697e4ee6837bc49e54f75753 |
| Accession Number: | edsdoj.b949e37d697e4ee6837bc49e54f75753 |
| Database: | Directory of Open Access Journals |
| ISSN: | 03702693 18732445 |
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| DOI: | 10.1016/j.physletb.2016.07.057 |
| Published in: | Physics Letters B |
| Language: | English |