Dynamic measurement of the surface tension of liquid helium with a two-dimensional electron probe
Dynamic measurement of the surface tension of liquid helium with a two-dimensional electron probe
复制标题
二维电子探针动态测量液氦表面张力
DOI：
10.1007/bf00681729
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发表时间：
1988
期刊：
影响因子：
--
通讯作者：
G. Deville
中科院分区：
文献类型：
--
作者：
G. Deville
Electrons deposited above the free surface of liquid helium exhibit coupled electron-ripplon modes whose frequencies are simply related to the surface tension α of helium. The hydrodynamic expression for the ripplon dispersion relation for pure4He is shown to be valid up to the wavevector range 105cm−1<q<2×106cm−1of the coupled modes. For a small amount of3He (X3⋍10−6−10−8) added to pure4He, we measure the variation of the surface tension in the 60–600 mK temperature range. These experiments, which cover the frequency range v⋍10–300 MHz, agree fairly well with previous static (capillary) or low-frequency (surface sound velocity) experiments.
