Shape Changes in the Mirror Nuclei ⁷⁰Kr and ⁷⁰Se

K Wimmer; W. Korten; P Doornenbal; T Arici; P. Aguilera; A Algora; T Ando; H Baba; B Blank; A. Boso; SX Chen; A. Corsi; P Davies; G de Angelis; G De France; J-P Delaroche; D. T. Doherty; Doherty D T; J. Gerl; R Gernhaeuser; M Girod; DG Jenkins; S. Koyama; T. Motobayashi; S Nagamine; M. Niikura; A. Obertelli; J Libert; D. Lubos; TR Rodriguez; B Rubio; E. Sahin; T Saito; H Sakurai; L. Sinclair; D Steppenbeck; R. Taniuchi; R Wadsworth; M. Zielinska

doi:10.1103/PhysRevLett.126.072501

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Shape Changes in the Mirror Nuclei ⁷⁰Kr and ⁷⁰Se

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Shape Changes in the Mirror Nuclei ⁷⁰Kr and ⁷⁰Se

K Wimmer, W. Korten, P Doornenbal, T Arici, P. Aguilera, A Algora, T Ando, H Baba, B Blank, A. Boso, …

Physical Review Letters, Vol.126, 072501

18/02/2021

DOI: https://doi.org/10.1103/PhysRevLett.126.072501

PMID: 33666458

Abstract

Collective levels

Coulomb energies & analogue states

Electromagnetic transitions

We studied the proton-rich Tz = -1 nucleus ⁷⁰Kr through inelastic scattering at intermediate energies in order to extract the reduced transition probability, B(E2; 0+ -> 2+). Comparison with the other members of the A = 70 isospin triplet, ⁷⁰Br and ⁷⁰Se, studied in the same experiment, shows a 3σ deviation from the expected linearity of the electromagnetic matrix elements as a function of Tz. At present, no established nuclear structure theory can describe this observed deviation quantitatively. This is the first violation of isospin symmetry at this level observed in the transition matrix elements. A heuristic approach may explain the anomaly by a shape change between the mirror nuclei ⁷⁰Kr and ⁷⁰Se contrary to the model predictions.

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Title: Shape Changes in the Mirror Nuclei ⁷⁰Kr and ⁷⁰Se
Creators: K Wimmer - CSIC, Inst Estruct Mat, E-28006 Madrid, Spain
W. Korten - Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France
P Doornenbal - RIKEN, Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
T Arici - GS Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany
P. Aguilera - Comis Chilena Energia Nucl, Casilla 188-D, Santiago, Chile
A Algora - Univ Valencia, Inst Fis Corpuscular, CSIC, E-46071 Valencia, Spain
T Ando - Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
H Baba - RIKEN, Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
B Blank - Univ Bordeaux, CENBG, CNRS, IN2P3, F-33175 Gradignan, France
A. Boso - Ist Nazl Fis Nucl, Sez Padova, I-35131 Padua, Italy
SX Chen - RIKEN, Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
A. Corsi - Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France
P Davies - Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England
G de Angelis - Ist Nazl Fis Nucl, Lab Nazl Legnaro, I-35020 Legnaro, Italy
G De France - CEA, GANIL, DSM, CNRS,IN2P3, F-14076 Caen 05, France
J-P Delaroche - CEA, DAM, DIF, F-91297 Arpajon, France
D. T. Doherty (Author)
Doherty D T - Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France
J. Gerl - GS Helmholtzzentrum Schwerionenforsch, D-64291 Darmstadt, Germany
R Gernhaeuser - Tech Univ Munich, Phys Dept, D-85748 Garching, Germany
M Girod - CEA, DAM, DIF, F-91297 Arpajon, France
DG Jenkins - Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England
S. Koyama - Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
T. Motobayashi - RIKEN, Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
S Nagamine - Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
M. Niikura - Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
A. Obertelli - Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France
J Libert - CEA, DAM, DIF, F-91297 Arpajon, France
D. Lubos - Tech Univ Munich, Phys Dept, D-85748 Garching, Germany
TR Rodriguez - Univ Autonoma Madrid, Dept Fis Teor, E-28049 Madrid, Spain
B Rubio - Univ Valencia, Inst Fis Corpuscular, CSIC, E-46071 Valencia, Spain
E. Sahin - Univ Oslo, Dept Phys, POB 1048, N-0316 Oslo, Norway
T Saito - Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
H Sakurai - Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
L. Sinclair - Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England
D Steppenbeck - RIKEN, Nishina Ctr, 2-1 Hirosawa, Wako, Saitama 3510198, Japan
R. Taniuchi - Univ Tokyo, Dept Phys, Bunkyo Ku, Tokyo 1130033, Japan
R Wadsworth - Univ York, Dept Phys, York YO10 5DD, N Yorkshire, England
M. Zielinska - Univ Paris Saclay, IRFU, CEA, F-91191 Gif Sur Yvette, France
Publication Details: Physical Review Letters, Vol.126, 072501
Publisher: American Physical Society
Date published: 18/02/2021
Date accepted: 05/01/2021
Grants: ST/L005727/1, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
ST/P003885/1, Science and Technology Facilities Council (United Kingdom, Swindon) - STFC
FPA2011-24553, Ministry of Economy, Industry and Competitiveness (Spain, Madrid) - MINECO
FPA2014-52823-C2-1-P, Ministry of Economy, Industry and Competitiveness (Spain, Madrid) - MINECO
Program Severo Ochoa, SEV-2014-0398, Ministry of Economy, Industry and Competitiveness (Spain, Madrid) - MINECO
PGC2018-094583-B-I00, Ministry of Economy, Industry and Competitiveness (Spain, Madrid) - MINECO
RYC-2017-22007, Ministry of Economy, Industry and Competitiveness (Spain, Madrid) - MINECO
MINOS-258567, European Research Council (Belgium, Brussels) - ERC
Grant note: We would like to thank the RIKEN accelerator and BigRIPS teams for providing the high intensity beams. This work has been supported by UK STFC under Grants No. ST/L005727/1 and No. ST/P003885/1, the Spanish Ministerio de Economía y Competitividad under Grants No. FPA2011-24553 and No. FPA2014-52823-C2-1-P, the Program Severo Ochoa (SEV-2014-0398), and the Spanish MICINN under PGC2018-094583-B-I00. K. W. acknowledges the support from the Spanish Ministerio de Economía y Competitividad RYC-2017-22007. A. O. acknowledges the support from the European Research Council through the ERC Grant No. MINOS-258567.
Identifiers: 99694865102346
Academic Unit: School of Maths and Physics
Language: English
Resource Type: Journal article

Shape Changes in the Mirror Nuclei ⁷⁰Kr and ⁷⁰Se

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