Abstract
Due to the simplicity of the or operator that causes Gamow-Teller (GT) transitions, they are the most popular nuclear weak process in the Universe. The GT transitions in pf-shell nuclei, for example, starting from stable T-z = +1 and proton-rich T-z = -1 nuclei, where T-z = (N-Z)/2, play important roles in the supernova-explosion or rp-process nucleosynthesis. In the beta-decay study of pf-shell nuclei, half-lives can be measured rather accurately. On the other hand, in a high-resolution (He-3, t) charge-exchange reaction at 0 degrees, individual GT transitions up to high excitations can be studied. In order to derive reliable GT transition strengths B(GT), we present a unique analysis that combines the strength distribution form the (He-3,t) measurement with the information from the study of mirror beta decay, where good isospin symmetry of T-z = +/- 1 -> 0 transitions is assumed.