Mirror Energy Differences at Large Isospin Studied through Direct Two-Nucleon Knockout

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

doi:10.1103/physrevlett.111.072501

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arXiv · 1308.1254

Mirror Energy Differences at Large Isospin Studied through Direct Two-Nucleon Knockout

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Abstract

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

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P. J. Davies, M. A. Bentley, T. W. Henry, E. C. Simpson, A. Gade, S. M. Lenzi, T. Baugher, D. Bazin, J. S. Berryman, A. M. Bruce, C. Aa. Diget, H. Iwasaki, A. Lemasson, S. McDaniel, D. R. Napoli, A. Ratkiewicz, L. Scruton, A. Shore, R. Stroberg, J. A. Tostevin, D. Weisshaar, K. Wimmer, R. Winkler. 2013-08-06. Mirror Energy Differences at Large Isospin Studied through Direct Two-Nucleon Knockout. https://doi.org/10.1103/physrevlett.111.072501

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