Discrepancies between observed ratios of $d$, ${}_{}{}^3{}_{}{}^{}\mathrm{He}$ and $d$, $t$ yields populating analog states in ${}_{}{}^{18}{}_{}{}^{}\mathrm{O}$ and ${}_{}{}^{18}{}_{}{}^{}\mathrm{F}$ and ratios calculated by standard distorted-wave theory, which were thought to provide evidence for a charge-dependent nuclear interaction, are resolved by extending the conventional theory to include both an explicit charge-exchange channel in the continuum and foŕm factors generated from a microscopic analysis.

• Received 18 May 1973

DOI:https://doi.org/10.1103/PhysRevLett.31.559