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

Date
2014
Author
Kucuk, L.
Fujita, H.
Gerbaux, M.
Giovinazzo, J.
Grevy, S.
Kamalou, O.
Orrigo, S. E. A.
Rubio, B.
Fujita, Y.
Blank, B.
Gelletly, W.
Agramunt, J.
Algora, A.
Kurtukian-Nieto, T.
Molina, F.
Popescu, L.
ROGERS, A. M.
Stodel, C.
Suzuki, T.
Tamii, A.
THOMAS, J. C.
Kozer, H. C.
Bilgier, B.
Ganioglu, Ela
Cakirli, R. B.
Susoy, G.
Ascher, P.
Caceres, L.
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Abstract
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.
URI
http://hdl.handle.net/20.500.12627/80339
https://doi.org/10.1103/physrevlett.112.222501
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