Measurement of Self-Diffusion in Liquid Crystals by a Multiple-Pulse NMR Method

A NMR technique, which consists of a superposition of (i) a Waugh-type multiple 90° rf pulse sequence removing dipolar interactions, (ii) a pulsed magnetic-field-gradient sequence, and (iii) a relatively slow Carr-Purcell train of 180° pulses is used to determine translational self-diffusion coefficients in liquid crystals where the classical NMR technique fails because of too short a $T_2$.