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

The first spectroscopy of excited states in 52Ni (T(z)=-2) and 51Co (T(z)=-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 noncons...

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Published in:Physical review letters 2013-08, Vol.111 (7), p.072501-072501, Article 072501
Main Authors: Davies, P J, Bentley, M A, Henry, T W, Simpson, E C, Gade, A, Lenzi, S M, Baugher, T, Bazin, D, Berryman, J S, Bruce, A M, Diget, C Aa, Iwasaki, H, Lemasson, A, McDaniel, S, Napoli, D R, Ratkiewicz, A, Scruton, L, Shore, A, Stroberg, R, Tostevin, J A, Weisshaar, D, Wimmer, K, Winkler, R
Format: Article
Language:English
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Summary:The first spectroscopy of excited states in 52Ni (T(z)=-2) and 51Co (T(z)=-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.
ISSN:0031-9007
1079-7114
DOI:10.1103/physrevlett.111.072501