Gamow-Teller strength in the beta decay of mirror nuclides

Distribution of the Gamow-Teller strength has been studied both experimentally and theoretically in the f/sub 7/2/ shell mirror nuclides over a wide energy range. Experimental studies were performed using light ion induced reactions and the He-jet transport method or the ion-guide on-line isotope separation, IGISOL. Several transitions were observed to excited states in the decays of 43Ti and 51Fe and some in the decays of 47Cr, 49Mn, 43Co and 55Ni. Theoretical calculations were made by a shell model code using f/sup n//sub 7/2/+(P/sub 3/2/, f/sub 5/2/, P/sub 1/2/)1 shell space. The β-feeding has been predicted for all transitions up to about 4 MeV excitation in each daughter nucleus. The quenching of the Gamow-Teller strength has been studied by comparing the experimental strength with the calculation. The formation of the giant Gamow-Teller resonance has been studied theoretically as a function of the mass number