FULL PF SHELL-MODEL STUDY OF A = 48 NUCLEI

Exact diagonalizations with a minimally modified realistic force lead to detailed agreement with measured level schemes and electromagnetic transitions in 48Ca, Sc-48, Ti-48, V-48, Cr-48, and 48Mn. Gamow-Teller strength functions are systematically calculated and reproduce the da ta to within the standard quenching factor. Their fine structure indic ates that fragmentation makes much strength unobservable. As a by-prod uct, the calculations suggest a microscopic description of the onset o f rotational motion. The spectroscopic quality of the results provides strong arguments in favor of the general validity of monopole correct ed realistic forces, which is discussed.