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From the same journal

Spectroscopy on the proton drip-line: Probing the structure dependence of isospin nonconserving interactions

Research output: Contribution to journalArticle

Published copy (DOI)


  • J. Henderson
  • K. Kaneko
  • P. Ruotsalainen
  • P. Sarriguren
  • K. Auranen
  • A. Görgen
  • T. Grahn
  • P. T. Greenlees
  • A. Hay
  • T. W. Henry
  • A. Herzáň
  • U. Jakobsson
  • R. Julin
  • S. Juutinen
  • J. Konki
  • M. Leino
  • C. McPeake
  • A. J. Nichols
  • J. Pakarinen
  • P. Papadakis
  • J. Partanen
  • P. Peura
  • P. Rahkila
  • E. Sahin
  • M. Sandzelius
  • J. Sarén
  • C. Scholey
  • M. Siciliano
  • L. Sinclair
  • J. Sorri
  • S. Stolze
  • J. Uusitalo
  • M. Zielińska


Publication details

JournalPhysical Review C (Nuclear Physics)
DatePublished - 18 Nov 2014
Issue number5
Number of pages4
Original languageEnglish


The recoil-β tagging technique was used to identify transitions associated with the decay of the 2+ and, tentatively, the 4+ excited states in Sr74. Combining these results with published data for the A=74 isobars, triplet energy differences (TEDs) have been extracted, the heaviest case for which these values have been evaluated. State-of-the-art shell-model calculations using the JUN45 interaction and incorporating a J=0 isospin nonconserving (INC) interaction with an isotensor strength of 100 keV can reproduce the trend in the TED data, with particularly good agreement for the 2+ state. This agreement for the TED data taken together with the fact that agreement has also been shown between shell-model calculations with the same strength of INC interaction in the f7/2 shell and recently for A=66 strongly suggests that such an interaction exists throughout the nuclear chart and cannot have a strong dependence on details of nuclear structure such as which nuclear orbitals are occupied. It also supports the hypothesis that only a J=0 component of the INC interaction need be included to explain the observed TEDs.

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