Probing isospin symmetry in the ( 50 Fe, 50 Mn, 50 Cr) isobaric triplet via electromagnetic transition rates

M.M. Giles, B.S. Nara Singh*, L. Barber, D.M. Cullen, M.J. Mallaburn, M. Beckers, A. Blazhev, T. Braunroth, A. Dewald, C. Fransen, A. Goldkuhle, J. Jolie, F. Mammes, C. Müller-Gatermann, D. Wolk, K.O. Zell, S.M. Lenzi, A. Poves

*Corresponding author for this work

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Lifetimes of the T=1 isobaric analog Iπ=2+states in 50Mn and 50Cr have been measured simultaneously by employing the recoil distance Doppler-shift ({RDDS}) technique. The states were populated in a fusion-evaporation reaction with a 12C beam on a 40Ca target. An analysis of the data and the calculations from the present work, together with the available B(E2:2+→0+) data of the isobaric analog states in 50Fe and 50Cr, have been used to study isospin symmetry in the three A=50 isobaric nuclei. Shell-model calculations reproduce the magnitudes as well as the increasing trend of the B(E2) data with increasing Z. In order to draw a firm conclusion on the level of isospin mixing in the triplet, a new precision measurement of the 2+→0+ transition rate in 50 Fe will be required.
Original languageEnglish
Article number044317
Number of pages8
JournalPhysical Review C
Issue number4
Publication statusPublished - 26 Apr 2019
Externally publishedYes



  • Nuclear structure
  • isospin symmetry

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