Isospin dependence of electromagnetic transition strengths among an isobaric triplet

Research output: Contribution to journalArticle


Electric quadrupole matrix elements, Mp, for the Jπ=2+→0+, ΔT=0, T=1 transitions across the A=46 isobaric multiplet 46Cr-46V-46Ti have been measured at GSI with the FRS-LYCCA-AGATA setup. This allows direct insight into the isospin purity of the states of interest by testing the linearity of Mp with respect to Tz. Pairs of nuclei in the T=1 triplet were studied using identical reaction mechanisms in order to control systematic errors. The Mp values were obtained with two different methodologies: (i) a relativistic Coulomb excitation experiment was performed for 46Cr and 46Ti; (ii) a “stretched target” technique was adopted here, for the first time, for lifetime measurements in 46V and 46Ti. A constant value of Mp across the triplet has been observed. Shell-model calculations performed within the fp shell fail to reproduce this unexpected trend, pointing towards the need of a wider valence space. This result is confirmed by the good agreement with experimental data achieved with an interaction which allows excitations from the underlying sd shell. A test of the linearity rule for all published data on complete T=1 isospin triplets is presented.


  • A. Boso
  • S. A. Milne
  • M. A. Bentley
  • F. Recchia
  • S. M. Lenzi
  • M. Labiche
  • X. Pereira-Lopez
  • S. Afara
  • F. Ameil
  • T. Arici
  • S. Aydin
  • M. Axiotis
  • D. Barrientos
  • G. Benzoni
  • B. Birkenbach
  • A. J. Boston
  • H. C. Boston
  • P. Boutachkov
  • A. Bracco
  • A. M. Bruce
  • B. Bruyneel
  • B. Cederwall
  • E. Clement
  • M. L. Cortes
  • D. M. Cullen
  • P. Désesquelles
  • Zs Dombràdi
  • C. Domingo-Pardo
  • J. Eberth
  • M. Gelain
  • V. González
  • P. R. John
  • J. Gerl
  • M. Górska
  • A. Gottardo
  • T. Grahn
  • L. Grassi
  • T. Habermann
  • L. J. Harkness-Brennan
  • T. W. Henry
  • H. Hess
  • I. Kojouharov
  • W. Korten
  • N. Lalović
  • M. Lettmann
  • C. Lizarazo
  • C. Louchart-Henning
  • R. Menegazzo
  • D. Mengoni
  • E. Merchan
  • C. Michelagnoli
  • B. Million
  • V. Modamio
  • Th. Moeller
  • D. R. Napoli
  • J. Nyberg
  • B. S. Nara Singh
  • H. Pai
  • N. Pietralla
  • S. Pietri
  • Zs Podolyak
  • R. M. Perez Vidal
  • A. Pullia
  • D. Ralet
  • G. Rainovski
  • M. Reese
  • P. Reiter
  • M. D. Salsac
  • E. Sanchis
  • H. Schaffner
  • L. M. Scruton
  • P.P. Singh
  • C. Stahl
  • S. Uthayakumaar
  • J. J. Valiente-Dobón
  • O. Wieland
External organisations
  • University of Padova
  • National Physical Laboratory, UK
  • University of York
  • Daresbury Laboratory
  • King Saud University
  • GSI Helmholtz Centre for Heavy Ion Research
  • Justus Liebig University Giessen
  • Aksaray University
  • INFN Laboratori Nazionali di Legnaro
  • CERN
  • INFN Section of Milano
  • University of Cologne
  • University of Liverpool
  • University of Milan
  • University of Paris-Saclay
  • KTH Royal Institute of Technology
  • National Large Heavy Ion Accelerator (GANIL)
  • Technical University of Darmstadt
  • University of Manchester
  • Hungarian Academy of Sciences
  • Institut de Physique Nucléaire Orsay (IPN) Orsay
  • University of Jyväskylä
  • INFN Section of Padova
  • Uppsala University
  • University of Surrey
  • University of Sofia
  • University of Valencia
  • CSIC-UV - Instituto de Física Corpuscular (IFIC)
  • Indian Institute of Technology Ropar, Rupnagar
  • University of Brighton
Research areas and keywords

Subject classification (UKÄ)

  • Subatomic Physics
Original languageEnglish
Article number134835
Number of pages6
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Publication statusPublished - 2019 Oct 10
Publication categoryResearch

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Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceeding

Pavel Golubev, A. Wendt, L. Scruton, J. Taprogge, Dirk Rudolph, P. Reiter, M. A. Bentley, Vladimir Avdeichikov, P. Boutachkov, S. P. Fox, J. Gerl, Ch. Goergen, Robert Hoischen, N. Kurz, B. S. Nara Singh, G. Pascovici, S. Pietri, H. Schaffner, M. J. Taylor, S. Thiel & 1 others, H. J. Wollersheim, 2013, In: Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 723, p. 55-66

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