TEXTURE DEPENDENCE OF THE PERSISTENT NMR SIGNAL IN SUPERFLUID HE-3-B

We have studied coherent magnetization precession in superfluid He-3 w ith pulsed NMR, to temperatures of approximate to 0.1T(c). Persistent signals were observed with lifetimes up to 60s at a frequency of 0.8MH z. We have found that the behaviour is reproducible for small levels o f NMR excitation, whilst becoming irreproducible for higher excitation s. We infer from this that textures play an essential role in the form ation of persistent signals.