Low multipolarity magnetic transitions inZr90excited by 180° electron scattering

Spectra of 37.2 and 60.6 MeV electrons scattered at 180° constitute evidence for very low observable $M1\mathrm{}$ transition strength and significant $M2\mathrm{}$ transition strength in the 9 MeV excitation energy region of ${}_{}{}^{90}{}_{}{}^{}\mathrm{Zr}$. This is consistent with recent high resolution results of other workers at more forward angles.