Electroexcitation of low-multipolarity magnetic transitions in ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$ and ${}_{}{}^{38}{}_{}{}^{}\mathrm{Ar}$

Measurements of inelastic electron scattering from ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$ and ${}_{}{}^{38}{}_{}{}^{}\mathrm{Ar}$ have been performed at low energy and backward angle to determine the distribution of M1 and M2 strength in these nuclei. The total observed M1 strength in ${}_{}{}^{36}{}_{}{}^{}\mathrm{Ar}$ is approximately 93% of that predicted in the measured energy region by shell-model calculations using effective M1 operators. In ${}_{}{}^{38}{}_{}{}^{}\mathrm{Ar}$, the single strong M1 transition predicted by shell-model calculations was not observed. Instead, a number of weak transitions were observed, with total M1 strength equal to about 134% of the predicted strength.