Nuclear Spin Relaxation in Superconducting Cadmium

The nuclear spin-lattice relaxation time, T
1
, in superconducting cadmium has been measured in the range of 0.37°K to 0.6°K. A field-cycling method was used. The results are explained by the theory of Bardeen, Cooper, and Schrieffer, and give another confirmation of the theory. The temperature dependence of T
1
in cadmium is identical to that in aluminum, which is surprising in view of the different crystal symmetry and band structure of the two metals.