Comparison of 0° (p, n) cross sections andB(M1)values for separating current and spin contributions to isovectorM1transitions

We present the ratio of experimental 0° ($p, n$) cross sections with the measured $B\left(M1\mathrm{}\right)\mathrm{}$ values for transitions in several nuclei. Taking the strong spin-flip transition in ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$ for normalization, we find overall good agreement with shell-model predictions for ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$, ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$, and ${}_{}{}^{48}{}_{}{}^{}\mathrm{Ca}$. The values of the ratios vary considerably and are very sensitive to the relative amounts of spin and current contributions to each transition. Experimental ratios are also presented for ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$ and ${}_{}{}^{26}{}_{}{}^{}\mathrm{Mg}$.