Evidence for pseudospin-chiral quartet bands in the presence of octupole correlations

Three nearly degenerate pairs of doublet bands are identified in 131Ba. Two of them, with positive-parity, are interpreted as pseudospin-chiral quartet bands. This is the first time that a complete set of chiral doublet bands built on the pseudospin partners π(d5/2,g7/2) is observed. The chiral band...

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Main Authors: S. Guo, C.M. Petrache, D. Mengoni, Y.H. Qiang, Y.P. Wang, Y.Y. Wang, J. Meng, Y.K. Wang, S.Q. Zhang, P.W. Zhao, A. Astier, J.G. Wang, H.L. Fan, E. Dupont, B.F. Lv, D. Bazzacco, A. Boso, A. Goasduff, F. Recchia, D. Testov, F. Galtarossa, G. Jaworski, D.R. Napoli, S. Riccetto, M. Siciliano, J.J. Valiente-Dobon, M.L. Liu, G.S. Li, X.H. Zhou, Y.H. Zhang, C. Andreoiu, F.H. Garcia, K. Ortner, K. Whitmore, A. Ataç-Nyberg, T. Bäck, B. Cederwall, E.A. Lawrie, I. Kuti, D. Sohler, T. Marchlewski, J. Srebrny, A. Tucholski
Format: Article
Language:English
Published: Elsevier 2020-08-01
Series:Physics Letters B
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S0370269320303762
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author S. Guo
C.M. Petrache
D. Mengoni
Y.H. Qiang
Y.P. Wang
Y.Y. Wang
J. Meng
Y.K. Wang
S.Q. Zhang
P.W. Zhao
A. Astier
J.G. Wang
H.L. Fan
E. Dupont
B.F. Lv
D. Bazzacco
A. Boso
A. Goasduff
F. Recchia
D. Testov
F. Galtarossa
G. Jaworski
D.R. Napoli
S. Riccetto
M. Siciliano
J.J. Valiente-Dobon
M.L. Liu
G.S. Li
X.H. Zhou
Y.H. Zhang
C. Andreoiu
F.H. Garcia
K. Ortner
K. Whitmore
A. Ataç-Nyberg
T. Bäck
B. Cederwall
E.A. Lawrie
I. Kuti
D. Sohler
T. Marchlewski
J. Srebrny
A. Tucholski
spellingShingle S. Guo
C.M. Petrache
D. Mengoni
Y.H. Qiang
Y.P. Wang
Y.Y. Wang
J. Meng
Y.K. Wang
S.Q. Zhang
P.W. Zhao
A. Astier
J.G. Wang
H.L. Fan
E. Dupont
B.F. Lv
D. Bazzacco
A. Boso
A. Goasduff
F. Recchia
D. Testov
F. Galtarossa
G. Jaworski
D.R. Napoli
S. Riccetto
M. Siciliano
J.J. Valiente-Dobon
M.L. Liu
G.S. Li
X.H. Zhou
Y.H. Zhang
C. Andreoiu
F.H. Garcia
K. Ortner
K. Whitmore
A. Ataç-Nyberg
T. Bäck
B. Cederwall
E.A. Lawrie
I. Kuti
D. Sohler
T. Marchlewski
J. Srebrny
A. Tucholski
Evidence for pseudospin-chiral quartet bands in the presence of octupole correlations
Physics Letters B
Nuclear structure
Pseudospin
Chirality
Octupole correlation
Reflection-asymmetric particle rotor model
Tilted axis cranking covariant density functional theory
author_facet S. Guo
C.M. Petrache
D. Mengoni
Y.H. Qiang
Y.P. Wang
Y.Y. Wang
J. Meng
Y.K. Wang
S.Q. Zhang
P.W. Zhao
A. Astier
J.G. Wang
H.L. Fan
E. Dupont
B.F. Lv
D. Bazzacco
A. Boso
A. Goasduff
F. Recchia
D. Testov
F. Galtarossa
G. Jaworski
D.R. Napoli
S. Riccetto
M. Siciliano
J.J. Valiente-Dobon
M.L. Liu
G.S. Li
X.H. Zhou
Y.H. Zhang
C. Andreoiu
F.H. Garcia
K. Ortner
K. Whitmore
A. Ataç-Nyberg
T. Bäck
B. Cederwall
E.A. Lawrie
I. Kuti
D. Sohler
T. Marchlewski
J. Srebrny
A. Tucholski
author_sort S. Guo
title Evidence for pseudospin-chiral quartet bands in the presence of octupole correlations
title_short Evidence for pseudospin-chiral quartet bands in the presence of octupole correlations
title_full Evidence for pseudospin-chiral quartet bands in the presence of octupole correlations
title_fullStr Evidence for pseudospin-chiral quartet bands in the presence of octupole correlations
title_full_unstemmed Evidence for pseudospin-chiral quartet bands in the presence of octupole correlations
title_sort evidence for pseudospin-chiral quartet bands in the presence of octupole correlations
publisher Elsevier
series Physics Letters B
issn 0370-2693
publishDate 2020-08-01
description Three nearly degenerate pairs of doublet bands are identified in 131Ba. Two of them, with positive-parity, are interpreted as pseudospin-chiral quartet bands. This is the first time that a complete set of chiral doublet bands built on the pseudospin partners π(d5/2,g7/2) is observed. The chiral bands with opposite parity built on 3-quasiparticle configurations are directly connected by many E1 transitions, without involving an intermediary non-chiral configuration. The observed band structures in 131Ba have been investigated by using the reflection-asymmetric particle rotor model. The energies and the electromagnetic transition ratios of the three pairs of doublet bands observed in 131Ba are reproduced and they are interpreted as chiral doublet bands with three-quasiparticle configurations. It is the first time that multiple chiral bands are observed in the presence of enhanced octupole correlations and pseudospin symmetry.
topic Nuclear structure
Pseudospin
Chirality
Octupole correlation
Reflection-asymmetric particle rotor model
Tilted axis cranking covariant density functional theory
url http://www.sciencedirect.com/science/article/pii/S0370269320303762
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spelling doaj-380990565489407d9f84fd5ef48e865f2020-11-25T03:39:12ZengElsevierPhysics Letters B0370-26932020-08-01807135572Evidence for pseudospin-chiral quartet bands in the presence of octupole correlationsS. Guo0C.M. Petrache1D. Mengoni2Y.H. Qiang3Y.P. Wang4Y.Y. Wang5J. Meng6Y.K. Wang7S.Q. Zhang8P.W. Zhao9A. Astier10J.G. Wang11H.L. Fan12E. Dupont13B.F. Lv14D. Bazzacco15A. Boso16A. Goasduff17F. Recchia18D. Testov19F. Galtarossa20G. Jaworski21D.R. Napoli22S. Riccetto23M. Siciliano24J.J. Valiente-Dobon25M.L. Liu26G.S. Li27X.H. Zhou28Y.H. Zhang29C. Andreoiu30F.H. Garcia31K. Ortner32K. Whitmore33A. Ataç-Nyberg34T. Bäck35B. Cederwall36E.A. Lawrie37I. Kuti38D. Sohler39T. Marchlewski40J. Srebrny41A. Tucholski42Key Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China; School of Nuclear Science and Technology, University of Chinese Academy of Science, Beijing 100049, People's Republic of China; Corresponding authors.Centre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, Bât. 104-108, 91405 Orsay, France; Corresponding authors.Dipartimento di Fisica e Astronomia, Université degli Studi di Padova, I-35131 Padova, Italy; INFN, Sezione di Padova, I-35131 Padova, ItalyKey Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of ChinaState Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of ChinaState Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of ChinaState Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of China; Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, JapanState Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of ChinaState Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of ChinaState Key Laboratory of Nuclear Physics and Technology, School of Physics, Peking University, Beijing 100871, People's Republic of ChinaCentre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, Bât. 104-108, 91405 Orsay, FranceKey Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China; School of Nuclear Science and Technology, University of Chinese Academy of Science, Beijing 100049, People's Republic of ChinaKey Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of ChinaCentre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, Bât. 104-108, 91405 Orsay, FranceCentre de Sciences Nucléaires et Sciences de la Matière, CNRS/IN2P3, Université Paris-Saclay, Bât. 104-108, 91405 Orsay, FranceDipartimento di Fisica e Astronomia, Université degli Studi di Padova, I-35131 Padova, Italy; INFN, Sezione di Padova, I-35131 Padova, ItalyDipartimento di Fisica e Astronomia, Université degli Studi di Padova, I-35131 Padova, Italy; INFN, Sezione di Padova, I-35131 Padova, ItalyDipartimento di Fisica e Astronomia, Université degli Studi di Padova, I-35131 Padova, Italy; INFN, Sezione di Padova, I-35131 Padova, ItalyDipartimento di Fisica e Astronomia, Université degli Studi di Padova, I-35131 Padova, Italy; INFN, Sezione di Padova, I-35131 Padova, ItalyDipartimento di Fisica e Astronomia, Université degli Studi di Padova, I-35131 Padova, Italy; INFN, Sezione di Padova, I-35131 Padova, ItalyINFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), Italy; Dipartimento di Fisica e Scienze della Terra, Université di Ferrara, Ferrara, ItalyINFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), ItalyINFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), ItalyINFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), ItalyINFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), ItalyINFN, Laboratori Nazionali di Legnaro, I-35020 Legnaro (Padova), ItalyKey Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China; School of Nuclear Science and Technology, University of Chinese Academy of Science, Beijing 100049, People's Republic of ChinaKey Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China; School of Nuclear Science and Technology, University of Chinese Academy of Science, Beijing 100049, People's Republic of ChinaKey Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China; School of Nuclear Science and Technology, University of Chinese Academy of Science, Beijing 100049, People's Republic of ChinaKey Laboratory of High Precision Nuclear Spectroscopy and Center for Nuclear Matter Science, Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, People's Republic of China; School of Nuclear Science and Technology, University of Chinese Academy of Science, Beijing 100049, People's Republic of ChinaDepartment of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, CanadaDepartment of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, CanadaDepartment of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, CanadaDepartment of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, CanadaKTH Department of Physics, S-10691 Stockholm, SwedenKTH Department of Physics, S-10691 Stockholm, SwedenKTH Department of Physics, S-10691 Stockholm, SwedeniThemba LABS, National Research Foundation, PO Box 722, 7131 Somerset West, South Africa; Department of Physics & Astronomy, University of the Western Cape, P/B X17, Bellville ZA-7535, South AfricaInstitute of Nuclear Research, Hungarian Academy of Sciences, 4001 Debrecen, HungaryInstitute of Nuclear Research, Hungarian Academy of Sciences, 4001 Debrecen, HungaryUniversity of Warsaw, Heavy Ion Laboratory, Pasteura 5a, 02-093 Warsaw, PolandUniversity of Warsaw, Heavy Ion Laboratory, Pasteura 5a, 02-093 Warsaw, PolandUniversity of Warsaw, Heavy Ion Laboratory, Pasteura 5a, 02-093 Warsaw, PolandThree nearly degenerate pairs of doublet bands are identified in 131Ba. Two of them, with positive-parity, are interpreted as pseudospin-chiral quartet bands. This is the first time that a complete set of chiral doublet bands built on the pseudospin partners π(d5/2,g7/2) is observed. The chiral bands with opposite parity built on 3-quasiparticle configurations are directly connected by many E1 transitions, without involving an intermediary non-chiral configuration. The observed band structures in 131Ba have been investigated by using the reflection-asymmetric particle rotor model. The energies and the electromagnetic transition ratios of the three pairs of doublet bands observed in 131Ba are reproduced and they are interpreted as chiral doublet bands with three-quasiparticle configurations. It is the first time that multiple chiral bands are observed in the presence of enhanced octupole correlations and pseudospin symmetry.http://www.sciencedirect.com/science/article/pii/S0370269320303762Nuclear structurePseudospinChiralityOctupole correlationReflection-asymmetric particle rotor modelTilted axis cranking covariant density functional theory