title: Stages of homogeneous nucleation in solid isotopic helium mixtures.
abstract: We have made pressure and NMR measurements during the evolution of phase separation in solid helium isotopic mixtures. Our observations indicate clearly all three stages of the homogeneous nucleation-growth process: (1) creation of nucleation sites; (2) growth of the new-phase component at these nucleation sites; and (3) coarsening: the dissolution of subcritical droplets with the consequent further late-stage growth of the supercritical droplets. The time exponent for the coarsening, a=1/3, is consistent with the conserved order parameter Lifshitz-Slezov evaporation-condensation mechanism.
authors: Millikelvin Laboratory, Royal Holloway University of London, Egham, TW20 0EX, United Kingdom.
authors: M
authors: M
authors: Poole
authors: J
authors: J
authors: Saunders
authors: B
authors: B
authors: Cowan