NUCLEAR SPIN-LATTICE RELAXATION IN CADMIUM AND TIN

Pulsed nuclear-magnetic-resonance measurements of the spin-lattice relaxation time T1 in Cd113 and Sn119 from 77 to 820°K are reported. An enhancement of the Korringa product T1TKiso2 that is constant with temperature but different in the solid and liquid states is observed. For Cd113, the difference between the liquid and solid enhancement is significant and can be related to a core-polarization or orbital contribution to the isotropic Knight shift Kiso. In solid Cd113, the sum of these two contributions to Kiso is about -9% as large as the contribution from the contact hyperfine interaction and that fraction is independent of temperature. In liquid Cd113 and solid and liquid Sn119, the sum of these contributions is probably small. © 1969 The American Physical Society.