PULSED NMR IN SUPERFLUID HE-3-B

We have performed pulsed NMR experiments in superfluid He-3-B under co nditions of high H0 and H1 homogeneity in order to study non-linear sp in dynamics. We made extensive measurements near the ''magic'' tipping angle in order to measure its temperature dependence. We report the d iscovery of new effects, including a small negative frequency shift at tipping angles close to, but slightly less than the ''magic'' tipping angle. We also discuss the evolution of the precession frequency as t he system relaxes after the RF pulse.