Nuclear magnetic resonance in LiF

The line width of the nuclear magnetic resonance in a single crystal of LiF has been observed as 11 G for 7Li and 12 G for 19F; these values are constant with temperature between 1.4 and 80°K. The spin-lattice relaxation time, T1, has been measured by observing the exponential growth of the absorption signal after saturation. The value of T1 for 7Li is 3.6 × 104sec at 14°K and is 7.8 × 102 sec at 80°K; for 19F the value of T1 is 1.8 × 104 sec at 1.4 °K and is 3.0 × 102 sec at 80°K. These values are for a steady field of 4 kG.