Missing and Quenched Gamow-Teller Strength

Gamow-Teller strength functions in the resonance region are calculated in the full $(\mathrm{pf}{)}^8$ space. The observed profile is very sensitive to the level density and may become so diluted as to be confused with background. A model independent proof is given that standard quenching originates in nuclear correlations, and that some 30% of the total strength must be due to states outside the $(\mathrm{pf}{)}^8$ space. By combining this argument with the results of shell model calculations, comparison with the ${}^{48}\mathrm{Ca}(p,n{)}^{48}\mathrm{Sc}$ experimental data strongly suggest that most of the strength that is currently thought to be missing is actually observed.