Wetting of Superfluid 4He by Liquid 3He

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Journal Title
Journal ISSN
Volume Title
School of Science | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
1994
Major/Subject
Mcode
Degree programme
Language
en
Pages
1388-1391
Series
Physical Review Letters, Volume 73, Issue 10
Abstract
We have investigated optically the spreading of He3 on top of the He4-rich solution in phase-separated helium-mixture films, 20-50 μm thick. In equilibrium, the He3 layer wets the He4-rich phase completely, but nearly circular or stripelike pools of He3-rich phase are stabilized instead when He4 atoms are condensed to the liquid sample at the rate 10 exp 15-5 × 10 exp 15 atoms/cm2s. For the contact angle we obtain about 10 mrad, which suggests a fractional change of the He3 surface tension by a factor of 10 exp −5 from the equilibrium value.
Description
Keywords
wetting, 3He/4He mixtures, optical interferometry
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Citation
Alles, H. & Ruutu, J. P. & Babkin, A. V. & Hakonen, Pertti J. 1994. Wetting of Superfluid 4He by Liquid 3He. Physical Review Letters. Volume 73, Issue 10. 1388-1391. ISSN 0031-9007 (printed). DOI: 10.1103/physrevlett.73.1388