The form factor for elastic magnetic scattering of electrons from ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ has been measured to a maximum momentum transfer of 3.29 ${\mathrm{fm}}^{-1\mathrm{}}$. No reasonable $p$-shell model, with or without one-pion exchange currents, could be found to explain the relative enhancement observed in the $M1\mathrm{}$ form factor above $q\simeq 2$ ${\mathrm{fm}}^{-1\mathrm{}}$.

NUCLEAR REACTIONS ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}(e, e)$, $E=80-338\mathrm{}$ MeV; measured $\sigma (E, \theta )$. ${}_{}{}^{13}{}_{}{}^{}\mathrm{C}$ deduced $M1\mathrm{}$ form factor. Comparison with shell model.

• Received 23 March 1982

DOI:https://doi.org/10.1103/PhysRevC.26.339