Abstract
The Gamow-Teller (GT) strength excited by a (p, n)-type reaction on a nucleus with isospin T 0 and N > Z is shared by isospin components T 0 − 1, T 0 and T 0 + 1. A good energy resolution ( 3He, t) reaction on 58Ni revealed the fine structure of the GT strength in 58Cu. The isospin of each level constituting the fine structure was assigned by comparing to results from inelastic electron and proton scatterings and (n, p)-type reactions, thus resolving the isospin structure of the GT strength in 58Cu. The ratio of the summed GT strengths among the three isospin components is well described by a shell-model calculation.
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