Observation of the β-Delayed γ-Proton Decay of Zn56 and its Impact on the Gamow-Teller Strength Evaluation

S. E. A. Orrigo et al.
Phys. Rev. Lett. 112, 222501 – Published 3 June 2014

Abstract

We report 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 Zn56. 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.

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  • Received 13 February 2014

DOI:https://doi.org/10.1103/PhysRevLett.112.222501

© 2014 American Physical Society

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Vol. 112, Iss. 22 — 6 June 2014

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