Absence of M3 Quenching in ${}^{26}$Mg

In a high-resolution electron scattering experiment ten $3^{+}$ states in ${}^{26}$Mg have been identified, increasing the world data on $M3\mathrm{}$ transitions severalfold. Differential cross sections have been measured and magnetization current densities and form factors have been deduced. It is found that while the level of agreement of the $B\left(M3\mathrm{}\right)$ values with shell-model predictions varies from state to state, the summed $B\left(M3\mathrm{}\right)$ strengths are in good agreement. No overall quenching of the $M3\mathrm{}$ strength is found, and it is concluded that no renormalization of the free nucleon g factors is needed.