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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.

Description

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]

dc.contributor.authorWatanabe, H.
dc.contributor.authorZhang, G.X.
dc.contributor.authorYoshida, K.
dc.contributor.authorWalker, P.M.
dc.contributor.authorLiu, J.J.
dc.contributor.authorWu, J.
dc.contributor.authorRegan, P.H.
dc.contributor.authorSöderström, P.-A.
dc.contributor.authorKanaoka, H.
dc.contributor.authorKorkulu, Z.
dc.contributor.authorLee, P.S.
dc.contributor.authorNishimura, S.
dc.contributor.authorYagi, A.
dc.contributor.authorAhn, D.S.
dc.contributor.authorAlharbi, T.
dc.contributor.authorBaba, H.
dc.contributor.authorBrowne, F.
dc.contributor.authorBruce, A M
dc.contributor.authorCarroll, R.J.
dc.contributor.authorChae, K.Y.
dc.contributor.authorDombradi, Zs.
dc.contributor.authorDoornenbal, P.
dc.contributor.authorEstrade, A.
dc.contributor.authorFukuda, N.
dc.contributor.authorGriffin, C.
dc.contributor.authorIdeguchi, E.
dc.contributor.authorInabe, N.
dc.contributor.authorIsobe, T.
dc.contributor.authorKanaya, S.
dc.contributor.authorKojouharov, I.
dc.contributor.authorKondev, F.G.
dc.contributor.authorKubo, T.
dc.contributor.authorKubono, S.
dc.contributor.authorKurz, N.
dc.contributor.authorKuti, I.
dc.contributor.authorLalkovski, S.
dc.contributor.authorLane, G.J.
dc.contributor.authorLee, C.S.
dc.contributor.authorLee, E.J.
dc.contributor.authorLorusso, G.
dc.contributor.authorLotay, G.
dc.contributor.authorMoon, C.-B.
dc.contributor.authorNishizuka, I.
dc.contributor.authorNita, C.R.
dc.contributor.authorOdahara, A.
dc.contributor.authorPatel, Z.
dc.contributor.authorPhong, V.H.
dc.contributor.authorPodolyák, Zs.
dc.contributor.authorRoberts, O.J.
dc.contributor.authorSakurai, H.
dc.contributor.authorSchaffner, H.
dc.contributor.authorShand, C.M.
dc.contributor.authorShimizu, Y.
dc.contributor.authorSumikama, T.
dc.contributor.authorSuzuki, H.
dc.contributor.authorTakeda, H.
dc.contributor.authorTerashima, S.
dc.contributor.authorVajta, Zs.
dc.contributor.authorValiente-Dóbon, J.J.
dc.contributor.authorXu, Z.Y.
dc.date.accessioned2016-11-08T00:37:34Z
dc.date.available2016-11-08T00:37:34Z
dc.identifier16532
dc.identifier.issn0370-2693
dc.identifier.urihttp://hdl.handle.net/1885/110174
dc.description.abstractThe 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 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.
dc.description.sponsorshipThis work was supported by JSPS KAKENHI Grant No. 24740188, 25247045, and 25287065, STFC (UK authors) and the UK National Measurement Office (PHR), the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under Contract No. DE-AC02-06CH11357 (FGK), NRF Korea Grants No. 2009-0093817 and 2013R1A1A2063017 (CSL), 2014S1A2A2028636 and 2016K1A3A7A09005579 (KYC), and Science Foundation Ireland under Grant No. 12/IP/1288 (OJR). The numerical calculations were performed on SR16000 at YITP, Kyoto University, and on COMA (PACS-IX) at CCS, University of Tsukuba.
dc.publisherElsevier
dc.rights© 2016 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/). Funded by SCOAP3.
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/
dc.sourcePhysics letters B
dc.source.urihttp://repo.scoap3.org/record/16532/files/main.pdf
dc.subject¹⁷²Dy
dc.subjectK isomer
dc.subjectDecay spectroscopy
dc.subjectAxial symmetry
dc.subjectγ vibration
dc.titleLong-lived K isomer and enhanced γ vibration in the neutron-rich nucleus ¹⁷²Dy: Collectivity beyond double midshell
dc.typeJournal article
dc.date.issued2016-08-31
local.publisher.urlhttp://www.elsevier.com/
local.type.statusPublished Version
local.contributor.affiliationWatanabe, H., School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191, China
local.contributor.affiliationZhang, G.X., School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191, China
local.contributor.affiliationYoshida, K., Graduate School of Science and Technology, Niigata University, Niigata, 950-2181, Japan
local.contributor.affiliationWalker, P.M., Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
local.contributor.affiliationLiu, J.J., Department of Physics, the University of Hong Kong, Pokfulam Road, Hong Kong
local.contributor.affiliationWu, J., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationRegan, P.H., Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
local.contributor.affiliationSöderström, P.-A., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationKanaoka, H., Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka, Toyonaka, 560-0043, Japan
local.contributor.affiliationKorkulu, Z., MTA Atomki, P.O. Box 51, Debrecen, H-4001, Hungary
local.contributor.affiliationLee, P.S., Department of Physics, Chung-Ang University, Seoul, 156-756, Republic of Korea
local.contributor.affiliationNishimura, S., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationYagi, A., Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka, Toyonaka, 560-0043, Japan
local.contributor.affiliationAhn, D.S., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationAlharbi, T., Department of Physics, College of Science in Zulfi, Almajmaah University, P.O. Box 1712, 11932, Saudi Arabia
local.contributor.affiliationBaba, H., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationBrowne, F., School of Computing Engineering and Mathematics, University of Brighton, Brighton, BN2 4GJ, United Kingdom
local.contributor.affiliationBruce, A.M., School of Computing Engineering and Mathematics, University of Brighton, Brighton, BN2 4GJ, United Kingdom
local.contributor.affiliationCarroll, R.J., Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
local.contributor.affiliationChae, K.Y., Department of Physics, Sungkyunkwan University, Suwon, 440-746, Republic of Korea
local.contributor.affiliationDombradi, Zs., MTA Atomki, P.O. Box 51, Debrecen, H-4001, Hungary
local.contributor.affiliationDoornenbal, P., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationEstrade, A., School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH9 3JZ, United Kingdom
local.contributor.affiliationFukuda, N., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationGriffin, C., School of Physics and Astronomy, University of Edinburgh, Edinburgh, EH9 3JZ, United Kingdom
local.contributor.affiliationIdeguchi, E., Research Center for Nuclear Physics (RCNP), Osaka University, Osaka, Ibaraki, 567-0047, Japan
local.contributor.affiliationInabe, N., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationIsobe, T., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationKanaya, S., Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka, Toyonaka, 560-0043, Japan
local.contributor.affiliationKojouharov, I., GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany
local.contributor.affiliationKondev, F.G., Nuclear Engineering Division, Argonne National Laboratory, Argonne, IL, 60439, USA
local.contributor.affiliationKubo, T., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationKubono, S., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationKurz, N., GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany
local.contributor.affiliationKuti, I., MTA Atomki, P.O. Box 51, Debrecen, H-4001, Hungary
local.contributor.affiliationLalkovski, S., Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
local.contributor.affiliationLane, G.J., Department of Nuclear Physics, R.S.P.E., Australian National University, Canberra, A.C.T, 0200, Australia
local.contributor.affiliationLee, C.S., Department of Physics, Chung-Ang University, Seoul, 156-756, Republic of Korea
local.contributor.affiliationLee, E.J., Department of Physics, Sungkyunkwan University, Suwon, 440-746, Republic of Korea
local.contributor.affiliationLorusso, G., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationLotay, G., Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
local.contributor.affiliationMoon, C.-B., Department of Display Engineering, Hoseo University, Chung-Nam, 336-795, Republic of Korea
local.contributor.affiliationNishizuka, I., Department of Physics, Tohoku University, Aoba, Sendai, Miyagi, 980-8578, Japan
local.contributor.affiliationNita, C.R., School of Computing Engineering and Mathematics, University of Brighton, Brighton, BN2 4GJ, United Kingdom
local.contributor.affiliationOdahara, A., Department of Physics, Osaka University, Machikaneyama-machi 1-1, Osaka, Toyonaka, 560-0043, Japan
local.contributor.affiliationPatel, Z., Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
local.contributor.affiliationPhong, V.H., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationPodolyák, Zs., Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
local.contributor.affiliationRoberts, O.J., School of Physics, University College Dublin, Dublin 4, Belfield, Ireland
local.contributor.affiliationSakurai, H., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationSchaffner, H., GSI Helmholtzzentrum für Schwerionenforschung GmbH, Darmstadt, 64291, Germany
local.contributor.affiliationShand, C.M., Department of Physics, University of Surrey, Guildford, GU2 7XH, United Kingdom
local.contributor.affiliationShimizu, Y., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationSumikama, T., Department of Physics, Tohoku University, Aoba, Sendai, Miyagi, 980-8578, Japan
local.contributor.affiliationSuzuki, H., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationTakeda, H., RIKEN Nishina Center, 2-1 Hirosawa, Saitama, Wako, 351-0198, Japan
local.contributor.affiliationTerashima, S., School of Physics and Nuclear Energy Engineering, Beihang University, Beijing, 100191, China
local.contributor.affiliationVajta, Zs., MTA Atomki, P.O. Box 51, Debrecen, H-4001, Hungary
local.contributor.affiliationValiente-Dóbon, J.J., Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Legnaro, Legnaro, 35020, Italy
local.contributor.affiliationXu, Z.Y., Department of Physics, the University of Hong Kong, Pokfulam Road, Hong Kong
local.bibliographicCitation.startpage641
local.bibliographicCitation.lastpage646
local.identifier.doi10.1016/j.physletb.2016.07.057
dc.date.updated2016-11-07T03:12:11Z
dcterms.accessRightsOpen Access
CollectionsANU Research Publications

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