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Phase structure of rapidly quenched solid helium samples is studied by theNMR technique. The pulse NMR method is used for measurements of spin-lattice$T_1$ and spin-spin $T_2$ relaxation times and spin diffusion coefficient $D$for all coexisting phases. It was found that quenched samples are two-phasesystems consisting of the hcp matrix and some inclusions which arecharacterized by $D$ and $T_2$ values close to those in liquid phase. Suchliquid-like inclusions undergo a spontaneous transition to a new state withanomalously short $T_2$ times. It is found that inclusions observed in both thestates disappear on careful annealing near the melting curve. It is assumedthat the liquid-like inclusions transform into a new state - a glass or acrystal with a large number of dislocations. These disordered inclusions may beresponsible for the anomalous phenomena observed in supersolid region.

NMR Study of Disordered Inclusions in the Quenched Solid Helium