Article révisé par les pairs
Résumé : Dynamical instabilities in experiments of liquid nuclear magnetic resonance with large nuclear magnetization were studied. The roles of tipping angle, overall shape of the sample, pulsed field gradients and radiation damping were investigated. The linear stability for small perturbations was discussed and numerical simulation were used to study turbulent spin motion for large perturbations. Results showed that linear instability was a combination of uniform transverse magnetization and Q-modulated longitudinal magnetization.