Interpretation of correlation length by small-angle X-ray scattering experiments on fluids near critical point

被引：6
|
作者：
Hayashi, Hisashi [1 ]
Morita, Takeshi [2 ]
Nishikawa, Keiko [3 ]
机构：
[1] Japan Womens Univ, Dept Chem & Biol Sci, Fac Sci, Bunkyo Ku, Tokyo 1128681, Japan
[2] Aichi Univ Educ, Fac Educ, Dept Chem, Aichi 4488542, Japan
[3] Chiba Univ, Grad Sch Adv Integrat Sci, Chiba 2638522, Japan
来源：
CHEMICAL PHYSICS LETTERS | 2009年 / 471卷 / 4-6期
关键词：
DENSITY FLUCTUATION; WATER MIXTURES;
D O I：
10.1016/j.cplett.2009.02.050
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
Small-angle X-ray scattering from fluids near the critical point, such as CHF(3), CO(2), Xe, and H(2)O, was analyzed using an intensity distribution function of fluctuating structures, D(R), in order to investigate the inhomogeneity in these fluids. It was found that the function D(R) proportional to 1/(R(4) + L(4)) could provide a good approximation of the intensity distribution functions of the fluctuating structures in the fluids. The Ornstein-Zernike correlation length (xi) was found to be related to the half width at half maximum ( L) of D( R): xi was approximately 5/18 of L. (C) 2009 Elsevier B. V. All rights reserved.
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页码：249 / 252
页数：4
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