Pulsed Nuclear Magnetic Resonance ofNa23in Rapidly Rotated NaCl

Abstract
High-speed sample-rotation studies of nuclear relaxation processes of Na23 in powdered NaCl are presented. A qualitative theory of the free-induction-decay shape under sample rotation is compared with experiment. The principal effects of sample rotation on the central line component for NaCl occur at rotation frequencies below the root-mean-square second moment in frequency units, in agreement with previous theories. First-order quadrupolar broadening can be eliminated provided sufficiently high rotation rates can be achieved.