The measured Gamow-Teller strength in ${}_{}{}^{37}{}_{}{}^{}\mathrm{Ca}$ ${\mathrm{\beta }}^{+}$ decay, which has an unusually high energy release, differs significantly from shell-model predictions and also from the analogous strength inferred from the ${}_{}{}^{37}{}_{}{}^{}\mathrm{Cl}$(p,n) reaction. This calls into question the claim, based primarily on shell-model analyses of low-energy-release β-decay rates and (p,n) cross sections, that ${\mathit{g}}_{\mathit{A}}$ is significantly renormalized in complex nuclei.

• Received 9 May 1991

DOI:https://doi.org/10.1103/PhysRevLett.67.3658