Vortex-Loops and Phase Nucleation in Superfluid 4He and 3He |
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Authors: | Nir Gov |
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Affiliation: | (1) Department of Physics, University of Illinois at Urbana-Champaign, 1110 Green St., Urbana, IL 61801, USA |
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Abstract: | We propose a new model for the nature of the nucleation of solid from the superfluid phases of
4
He and
3
He. A fast solidification event in the superfluid results in a local release of pressure and a velocity field in the superfluid. This in turn facilitates the nucleation of vortex-loops. The kinetic energy gain of this process balances the surface tension, as the solid surface is quickly covered by many vortex-loops ( hairy snow-ball ). We show that this scenario gives good agreement with experiments on heterogeneous nucleation. |
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Keywords: | |
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