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From the same journal

Shape changes in the mirror nuclei $^{70}$Kr and $^{70}$Se

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  • K Wimmer
  • W Korten
  • P Doornenbal
  • T Arici
  • P Aguilera
  • A Algora
  • T Ando
  • H Baba
  • B Blank
  • A Boso
  • S Chen
  • A Corsi
  • G de Angelis
  • G de France
  • J-P Delaroche
  • J Gerl
  • R Gernhäuser
  • M Girod
  • S Koyama
  • T Motobayashi
  • S Nagamine
  • M Niikura
  • A Obertelli
  • J Libert
  • D Lubos
  • T R Rodríguez
  • B Rubio
  • E Sahin
  • T Y Saito
  • H Sakurai
  • L Sinclair
  • D Steppenbeck
  • M Zielinska


Publication details

JournalPhysical Review Letters
DateAccepted/In press - 7 Jan 2021
DatePublished (current) - 19 Feb 2021
Issue number7
Pages (from-to)072501
Original languageEnglish


We studied the proton-rich T_{z}=-1 nucleus ^{70}Kr 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, ^{70}Br and ^{70}Se, studied in the same experiment, shows a 3σ deviation from the expected linearity of the electromagnetic matrix elements as a function of T_{z}. 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 ^{70}Kr and ^{70}Se contrary to the model predictions.

Bibliographical note

accepted PRL

    Research areas

  • nucl-ex, nucl-th


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