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 βdecay of the Tz=-2 nucleus Zn56. Three γ-proton sequences have been observed after the βdecay. 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.
ASJC Scopus subject areas
- Physics and Astronomy(all)