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From the same journal

Mirror energy differences above the 0f7/2 shell: First γ-ray spectroscopy of the Tz = −2 nucleus 56Zn

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  • A. Fernández
  • A. Jungclaus
  • P. Doornenbal
  • S.M. Lenzi
  • D. Rudolph
  • F. Browne
  • M.L. Cortés
  • T. Koiwai
  • V. Vaquero
  • K. Wimmer
  • T. Arici
  • N. Imai
  • N. Kitamura
  • B. Longfellow
  • R. Lozeva
  • B. Mauss
  • D.R. Napoli
  • M. Niikura
  • X. Pereira-Lopez
  • S. Pigliapoco
  • A. Poves
  • F. Recchia
  • P. Ruotsalainen
  • H. Sakurai
  • S. Uthayakumaar
  • R. Yajzey


Publication details

JournalPhysics Letters B
DateAccepted/In press - 15 Nov 2021
DateE-pub ahead of print - 19 Nov 2021
DatePublished (current) - 10 Dec 2021
Number of pages5
Early online date19/11/21
Original languageEnglish


Excited states in 56Zn were populated following one-neutron removal from a 57Zn beam impinging on a Be target at intermediate energies in an experiment conducted at the Radioactive Isotope Beam Factory at RIKEN. Three γ rays were observed and tentatively assigned to the 6+→4+→2+→0+ yrast sequence. This turns 56Zn into the heaviest Tz=−2 nucleus in which excited states are known. The excitation-energy differences between these levels and the isobaric analogue states in the Tz=+2 mirror partner, 56Fe, are compared with large-scale shell-model calculations considering the full pf valence space and various isospin-breaking contributions. This comparison, together with an analysis of the mirror energy differences in the A=58, Tz=±1 pair 58Zn and 58Ni, provides valuable information with respect to the size of the monopole radial and the isovector multipole isospin-breaking terms in the region above doubly-magic 56Ni.

Bibliographical note

©2021 The Author(s). Published by Elsevier B.V.


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