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., et al.

PHYSICAL REVIEW LETTERS, cilt.112, 2014 (SCI İndekslerine Giren Dergi) identifier identifier identifier

Özet

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.