An interference method for studying a substance in the vicinity of its critical point

被引：0

作者：

V. G. Domelunksen

I. R. Krylov

G. A. Polyanskaya

M. A. Tsygankov

机构：

[1] St. Petersburg State University,Institute of Physics

来源：

Optics and Spectroscopy | 2004年 / 97卷

关键词：

Xenon; Interference Pattern; Critical Exponent; Interference Fringe; Grazing Incidence;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

An interference method for measuring certain parameters of a substance in the vicinity of the critical state is proposed. The essence of the method is to decipher the interference pattern arising upon grazing incidence of a laser beam on a curved liquid-vapor interface. The deciphering allows one to determine the difference between the refractive indices of the two phases and the scaling factor of the wetting meniscus shape. This, in turn, makes it possible to calculate the critical exponents for the temperature dependences of the surface tension and the difference in the densities of the two phases. The ratio of these critical exponents for xenon, measured in the paper, is 3.81±0.03.

引用

页码：136 / 140

页数：4

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