First identification of Zn-58 beta-delayed proton emission

A. A. Ciemny,W. Dominik, T. Ginter,R. Grzywacz,Z. Janas,M. Kuich,C. Mazzocchi,M. Pfutzner,M. Pomorski,D. Bazin,T. Baumann, A. Bezbakh,B. P. Crider, M. Cwiok,S. Go,G. Kaminski, K. Kolos,A. Korgul,E. Kwan, S. Liddick,K. Miernik, V Paulauskas S.,J. Pereira, T. Roginski, K. Rykaczewski, C. Sumithtatachchi,Y. Xiao, H. Schatz,P. Sarriguren

PHYSICAL REVIEW C（2020）

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摘要

The beta decay of Zn-57 and Zn-58 was investigated in an experiment at the National Superconducting Cyclotron Laboratory of Michigan State University. For the first time beta-delayed proton emission from Zn-58 was observed with a branching ratio of 0.7(1)%. The proton-energy spectrum allowed for probing the Gamow-Teller strength distribution above the proton-separation energy in the daughter nucleus. Moreover, the absolute branching ration for delayed-proton emission from Zn-57 was found to be compatible with 100%.

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