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Optical interferometry in phase separated He---He mixture films
Authors:H. Alles   J. P. Ruutu   A. V. Babkin  P. J. Hakonen
Affiliation:

Low Temperature Laboratory, Helsinki University of Technology, 02150, Espoo, Finland

Abstract:We report on interferometric studies of 3He---4He liquid mixtures. Anomalous wetting phenomena were observed in phase separated mixture films: the upper 3He-rich phase did not wet the lower 4He-rich phase under a small continuous feed of 4He atoms to the vapor phase. Instead, under this dynamic situation, floating pools of the 3He-rich phase were stabilized with a contact angle on the order of 10 mrad. In equilibrium, the concentrated 3He-rich phase was found to nucleate uniformly on the free surface, consistent with Antonow's rule.
Keywords:
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