Proton Magnetic Susceptibility of Solid CH3D

The temperature dependence of the proton magnetic susceptibility of solid CH₃D (commerical purity) has been measured between 4.2 and 1.2°K by a NMR absorption experiment. The susceptibility was found to vary as T⁻¹ between 4.2 and 1.5°K within an experimental error of $\text{± 3\%}$ . At 1.15°K the observed susceptibility was approximately 5% greater than predicted from a T⁻¹ law, indicating that some conversion from E to A type nuclear spin symmetry may have occurred.