Mirror energy differences at large isospin studied through direct two-nucleon knockout

P.J. Davies, M.A. Bentley, T.W. Henry, C.A. Diget, L. Scruton, E.C. Simpson, J.A. Tostevin, A. Gade, T. Baugher, D. Bazin, J.S. Berryman, H. Iwasaki, A. Lemasson, S. McDaniel, A. Ratkiewicz, A. Shore, R. Stroberg, D. Weisshaar, K. Wimmer, R. WinklerS.M. Lenzi, A.M. Bruce, D.R. Napoli

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The first spectroscopy of excited states in Ni52 (T=-2) and Co51 (T=-3/2) has been obtained using the highly selective two-neutron knockout reaction. Mirror energy differences between isobaric analogue states in these nuclei and their mirror partners are interpreted in terms of isospin nonconserving effects. A comparison between large-scale shell-model calculations and data provides the most compelling evidence to date that both electromagnetic and an additional isospin nonconserving interactions for J=2 couplings, of unknown origin, are required to obtain good agreement.
Original languageEnglish
Article number072501
Number of pages5
JournalPhysical Review Letters
Issue number7
Publication statusPublished - 16 Aug 2013

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