Stages of Homogeneous Nucleation in Solid Isotopic Helium Mixtures

Details Stages of Homogeneous Nucleation in Solid Isotopic Helium Mixtures Stages of Homogeneous Nucleation in Solid Isotopic Helium Mixtures

2007-11-21

arxiv.org/abs/0711.3426v1

Physics

Condensed Matter

Other Condensed Matter

Submitted to PRL

Scientific paper

10.1103/PhysRevLett.100.075301

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 sub-critical droplets with the consequent further late-stage growth of the super-critical droplets. The time exponent for the coarsening, a = 1/3, is consistent with the conserved order parameter Lifshitz-Slezov evaporation-condensation mechanism.

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