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Structure of proton-rich nuclei via mirror beta decay and charge exchange reactions

Sonja Orrigo (Instituto de Física Corpuscular, Valencia, España)

Decay spectroscopy is a powerful tool to explore nuclei at the proton drip-line since the beta decay has a direct access to the absolute values of the Fermi B(F) and Gamow-Teller B(GT) transition strengths. Charge Exchange (CE) reactions such as (p,n) or (3He,t) are the mirror strong interaction process and provide information on the relative B(GT) values without energy restrictions. Hence beta decay and CE studies are complementary tools. Their combined analysis allows us the investigation of fundamental questions related to the role of the isospin in atomic nuclei, such as isospin symmetry in mirror nuclei [1,2].

The beta decay of the proton-rich, Tz = -2 nuclei 56Zn [3], 48Fe and 52Ni [4], and of the odd-odd, Tz = -1 nucleus 52Co [5] has been studied in an experiment performed at GANIL. New interesting results will be presented going from the first observation of a new decay mode, the exotic beta-delayed gamma-proton decay seen in 56Zn [3], to the first observation of the 2+ isomer in 52Co [5]. In all cases partial decay schemes have been determined, with absolute B(F) and B(GT) strengths. The results for the Tz = -2 nuclei [4] are compared with those obtained by complementary (3He,t) CE reactions carried out on the mirror stable targets at RCNP Osaka.

"CNNP 2017 - Conference on Neutrino and Nuclear Physics" (Catania, 15-21 October 2017)

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