七、氦膜液氦的另一个奇特的性质是氦膜。在λ-点以下,在与液氦接触而暴露的固体表面上很快由液氦的一层薄膜所复盖,这层膜叫做氦膜,它有许多奇怪的性质。例如,图7(a)所示的一个部份浸于液氦里的烧杯,当烧杯外的液面高时,烧杯将渐渐地被液体所注入,直到内外表面平行一致。注入是由氦膜通过烧杯的边缘流动所引起 Seven, helium film liquid helium Another peculiar nature of the helium film. Below the λ-point, the surface of the solid exposed in contact with the liquid helium is quickly covered by a thin film of liquid helium, which is called the helium film and has many weird properties. For example, one part of Figure 7 (a) is immersed in a beaker of liquid helium. When the level outside the beaker is high, the beaker will gradually be filled with liquid until the inner and outer surfaces are in parallel. Infusion is caused by the flow of the helium film through the beaker’s rim