Observation of the β-Delayed γ-Proton Decay of 56Zn and its Impact on the Gamow-Teller Strength Evaluation

S. E. A Orrigo, B. Rubio, Y. Fujita, B. Blank, W. Gelletly, J. Agramunt, A. Algora, P. Ascher, B. Bilgier, L. Caceres, R.B. Cakirli, H. Fujita, E. Ganioglu, M. Gerbaux, J. Giovinazzo, S. Grevy, O. Kamalou, H.C. Kozer, L. Kucuk, T. Kurtukian-NietoF. Molina, Lucia Popescu, A.M. Rogers, G. Susoy, C. Stodel, T. Suzuki, A. Tamii, J.C. Thomas, Marc Schyns

    Research outputpeer-review


    The paper reports the observation of a very exotic decay mode at the proton drip line, the β-delayed γ-proton decay, clearly seen in the β decay of the Tz = −2 nucleus 56Zn. Three γ-proton sequences have been observed after the β decay. Here this decay mode, already observed in the sd shell, is seen for the first time in the fp shell. Both γ and proton decays have been taken into account in the estimation of the Fermi and Gamow-Teller strengths. Evidence for fragmentation of the Fermi strength due to strong isospin mixing is found.
    Original languageEnglish
    Pages (from-to)2225011-2225015
    JournalPhysical review Letters
    StatePublished - 3 Jun 2014

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