gamma-ray spectroscopy of low-lying yrast and non-yrast states in neutron-rich Kr-94,Kr-95,Kr-96

R-B Gerst; A. Blazhev; K. Moschner; P. Doornenbal; A. Obertelli; K. Nomura; J-P Ebran; S. Hilaire; J. Libert; G. Authelet; H. Baba; D. Calvet; F. Chateau; S. Chen; A. Corsi; A. Delbart; J-M Gheller; A. Giganon; A. Gillibert; Lapoux; T. Motobayashi; M. Niikura; N. Paul; J-Y Rousse; H. Sakurai; C. Santamaria; D. Steppenbeck; R. Taniuchi; T. Uesaka; T. Ando; T. Arici; F. Browne; A. M. Bruce; R. Caroll; L. X. Chung; M. L. Cortes; M. Dewald; B. Ding; F. Flavigny; S. Franchoo; M. Gorska; A. Gottardo; J. Jolie; A. Jungclaus; J. Lee; M. Lettmann; B. D. Linh; J. Liu; Z. Liu; C. Lizarazo; S. Momiyama; S. Nagamine; N. Nakatsuka; C. R. Nita; C. Nobs; L. Olivier; R. Orlandi; Z. Patel; Zs Podolyak; M. Rudigier; T. Saito; C. Shand; P-A Soderstrom; Stefan; V. Vaquero; Werner; K. Wimmer; Z. Xu

doi:10.1103/PhysRevC.105.024302

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gamma-ray spectroscopy of low-lying yrast and non-yrast states in neutron-rich Kr-94,Kr-95,Kr-96

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gamma-ray spectroscopy of low-lying yrast and non-yrast states in neutron-rich Kr-94,Kr-95,Kr-96

R-B Gerst, A. Blazhev, K. Moschner, P. Doornenbal, A. Obertelli, K. Nomura, J-P Ebran, S. Hilaire, J. Libert, G. Authelet, …

Physical review. C, Vol.105(2), 024302

03/02/2022

DOI: https://doi.org/10.1103/PhysRevC.105.024302

Abstract

Physical Sciences

Physics

Physics, Nuclear

Science & Technology

We report on gamma-ray spectroscopy of low-lying excited states in the neutron-rich Kr-94,Kr-95,Kr-96 isotopes measured as part of the "Shell Evolution And Search for Two-plus energies At RIBF" (SEASTAR) campaign at the RIKEN Radioactive Isotope Beam Factory. Excited yrast and non-yrast states were observed, and half-lives extracted via GEANT4 simulations. In Kr-94,Kr-96 candidates for the 3-1 state were identified. For Kr-95, the prompt SEASTAR data were combined with delayed spectroscopic data measured with the EURICA array to observe transitions on top of the known (7/2)(+) isomer at a level energy of 195.5(3) keV. The comparison of the new experimental results with five-dimensional collective Hamiltonian (5DCH) and mapped interacting boson model (IBM) calculations, both using the Gogny D1M interaction, could suggest oblate-prolate shape coexistence already in Kr-96.

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Title: gamma-ray spectroscopy of low-lying yrast and non-yrast states in neutron-rich Kr-94,Kr-95,Kr-96
Creators: R-B Gerst - University of Cologne
A. Blazhev - University of Cologne
K. Moschner - University of Cologne
P. Doornenbal - RIKEN
A. Obertelli - RIKEN
K. Nomura - University of Zagreb
J-P Ebran - CEA, DAM, DIF, F-91297 Arpajon, France
S. Hilaire - CEA, DAM, DIF, F-91297 Arpajon, France
J. Libert - CEA, DAM, DIF, F-91297 Arpajon, France
G. Authelet - University of Paris-Saclay
H. Baba - RIKEN
D. Calvet - University of Paris-Saclay
F. Chateau - University of Paris-Saclay
S. Chen - RIKEN
A. Corsi - University of Paris-Saclay
A. Delbart - University of Paris-Saclay
J-M Gheller - University of Paris-Saclay
A. Giganon - University of Paris-Saclay
A. Gillibert - University of Paris-Saclay
Lapoux - University of Paris-Saclay
T. Motobayashi - RIKEN
M. Niikura - The University of Tokyo
N. Paul - University of Paris-Saclay
J-Y Rousse - University of Paris-Saclay
H. Sakurai - RIKEN
C. Santamaria - University of Paris-Saclay
D. Steppenbeck - RIKEN
R. Taniuchi - RIKEN
T. Uesaka - RIKEN
T. Ando - RIKEN
T. Arici - GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany
F. Browne - University of Brighton
A. M. Bruce - University of Brighton
R. Caroll - Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England
L. X. Chung - Vietnam Atomic Energy Instiute
M. L. Cortes - GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany
M. Dewald - University of Cologne
B. Ding - Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
F. Flavigny - University of Paris-Saclay
S. Franchoo - University of Paris-Saclay
M. Gorska - GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany
A. Gottardo - University of Paris-Saclay
J. Jolie - University of Cologne
A. Jungclaus - CSIC, Inst Estruct Mat, Madrid 28006, Spain
J. Lee - University of Hong Kong
M. Lettmann - Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany
B. D. Linh - Vietnam Atomic Energy Instiute
J. Liu - University of Hong Kong
Z. Liu - Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China
C. Lizarazo - GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany
S. Momiyama - RIKEN
S. Nagamine - RIKEN
N. Nakatsuka - RIKEN
C. R. Nita - Horia Hulubei National Institute for R and D in Physics and Nuclear Engineering
C. Nobs - University of Brighton
L. Olivier - University of Paris-Saclay
R. Orlandi - Japan Atom Energy Agcy, Adv Sci Res Ctr, Tokai, Ibaraki 3191195, Japan
Z. Patel - University of Surrey
Zs Podolyak - University of Surrey
M. Rudigier - University of Surrey
T. Saito - RIKEN
C. Shand - Univ Surrey, Dept Phys, Guildford GU2 7XH, Surrey, England
P-A Soderstrom - RIKEN
Stefan - University of Paris-Saclay
V. Vaquero - CSIC, Inst Estruct Mat, Madrid 28006, Spain
Werner - Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany
K. Wimmer - The University of Tokyo
Z. Xu - University of Hong Kong
Publication Details: Physical review. C, Vol.105(2), 024302
Publisher: Amer Physical Soc
Number of pages: 11
Date published: 03/02/2022
Grant note: BL 1513/1-1 / Deutsche Forschungs-gemeinschaft (DFG-German Research Foundation); German Research Foundation (DFG) 05P15PKFNA; 05P19PKFNA; 05P15RDFN1; 05P19RDFN1; 05P21RDFN1 / BMBF; Federal Ministry of Education & Research (BMBF) Tenure Track Pilot Programme of the Croatian Science Foundation Ecole Polytechnique Federale de Lausanne TTP-2018-07-3554 / Exotic Nuclear Structure and Dynamics 12135004; 11635003; 11961141004 / National Natural Science Foundation of China; National Natural Science Foundation of China (NSFC) JP14J08718 / JSPS; Ministry of Education, Culture, Sports, Science and Technology, Japan (MEXT); Japan Society for the Promotion of Science Croatian-Swiss Research Programme
Identifiers: 99822609302346
Academic Unit: School of Maths and Physics
Language: English
Resource Type: Journal article

gamma-ray spectroscopy of low-lying yrast and non-yrast states in neutron-rich Kr-94,Kr-95,Kr-96

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