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 ${}_{}{}^{26}{}_{}{}^{}\mathrm{Mg}$.

NUCLEAR REACTIONS Charge exchange ($p, n$) at 0°, $E_p=62-160\mathrm{}$ MeV, cross sections; targets ${}_{}{}^{12}{}_{}{}^{}\mathrm{C}$, ${}_{}{}^{16}{}_{}{}^{}\mathrm{O}$, ${}_{}{}^{24}{}_{}{}^{}\mathrm{Mg}$, ${}_{}{}^{26}{}_{}{}^{}\mathrm{Mg}$, ${}_{}{}^{28}{}_{}{}^{}\mathrm{Si}$, ${}_{}{}^{48}{}_{}{}^{}\mathrm{Ca}$. Compared ${\sigma }_{p,n}\left(0\mathrm{}°\right)$ with $B\left(M1\mathrm{}\right)\mathrm{}$ values from inelastic electron scattering.

• Received 5 March 1982

DOI:https://doi.org/10.1103/PhysRevC.26.8