Figure 1

Isospin-symmetry-breaking correction ${\delta }_C$, in percent, plotted as a function of atomic number $Z$ of the daughter nucleus. The solid circular points with error bars are the values of ${\delta }_C$ obtained from Eq. (5), with the experimental $\mathit{ft}$ values and the values of ${\delta }_R^{\prime }$ and ${\delta }_{\mathrm{NS}}$ (and their uncertainties) all taken from Table . In effect, we treat these as the “experimental” ${\delta }_C$ values. The X’s joined by lines represent the ${\delta }_C$ values calculated by the various models described in the text and identified in the top left of each graph. The value of $\overline{\mathcal{F}t}$ in Eq. (5) has been adjusted in each case by least-squares fitting to optimize the agreement between the experimental ${\delta }_C$ values and the calculated ones. The corresponding values of ${\chi }^2/n_d$ are listed in the next-to-last row of Table .Reuse & Permissions