Wetting of superfluid 4He by liquid 3He.
Wetting of superfluid 4He by liquid 3He.
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液体 3He 润湿超流体 4He。
DOI：
10.1103/physrevlett.73.1388
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发表时间：
1994
影响因子：
8.6
通讯作者：
Hakonen
中科院分区：
文献类型：
--
作者：
Allés;Ruutu;Babkin;Hakonen
在20 ~ 50 μm厚的相分离氦混合膜中，用光学方法研究了He 3在富He 4溶液上的扩散。在平衡状态下，He - 3层完全湿润富He - 4相，但当He - 4原子以10 15-5× 10 15个原子/ cm2的速率凝聚到液体样品中时，富He - 3相的近圆形或条纹状池被稳定下来。对于接触角，我们得到约10 mrad，这表明He 3表面张力与平衡值相比有10−5倍的分数变化。
We have investigated optically the spreading of He 3 on top of the He 4-rich solution in phase-separated helium-mixture films, 20-50 μm thick. In equilibrium, the He 3 layer wets the He 4-rich phase completely, but nearly circular or stripelike pools of He 3-rich phase are stabilized instead when He 4 atoms are condensed to the liquid sample at the rate 10 15-5× 10 15 atoms/cm 2 s. For the contact angle we obtain about 10 mrad, which suggests a fractional change of the He 3 surface tension by a factor of 10− 5 from the equilibrium value.