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

Orrigo S. E. A. , Rubio B., Fujita Y., Blank B., Gelletly W., Agramunt J., ...More

PHYSICAL REVIEW LETTERS, vol.112, no.22, 2014 (Journal Indexed in SCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 112 Issue: 22
  • Publication Date: 2014
  • Doi Number: 10.1103/physrevlett.112.222501
  • Journal Indexes: Science Citation Index Expanded, Scopus


We report the observation of a very exotic decay mode at the proton drip line, the beta-delayed gamma-proton decay, clearly seen in the beta decay of the T-z = -2 nucleus Zn-56. Three gamma-proton sequences have been observed after the beta decay. Here this decay mode, already observed in the sd shell, is seen for the first time in the f p shell. Both. 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.