X-ray study of the structure of liquid water

被引：58
|
作者：
Fu, Ling [1 ,2 ]
Bienenstock, Arthur [1 ,2 ]
Brennan, Sean [2 ]
机构：
[1] Stanford Univ, Dept Appl Phys, Stanford, CA 94305 USA
[2] Stanford Linear Accelerator Ctr, Stanford Synchrotron Radiat Lab, Menlo Pk, CA 94025 USA
来源：
JOURNAL OF CHEMICAL PHYSICS | 2009年 / 131卷 / 23期
关键词：
Compton effect; intermolecular mechanics; liquid structure; water; X-ray scattering; RADIAL-DISTRIBUTION FUNCTION; SCATTERING EXPERIMENTS; TEMPERATURE; DIFFRACTION; INTENSITIES; PRESSURE; MODEL;
D O I：
10.1063/1.3273874
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：
The radial distribution function (RDF) of liquid water has been determined by x-ray scattering. Using a free-standing water jet and a diffracted beam analyzer to separate the Compton from the elastic scattering experimentally, several significant sources of error have been eliminated in the experiment. These have enabled the collection of quality data out to 19.7 A degrees(-1). Data were collected both at 278 K and at 296 K. Our RDF presents fine structure, particularly, a distinct peak at 3.4 A degrees and a peak split at 4.5 A degrees. These features cannot be interpreted by a simple tetrahedral configuration suggested by continuum models. The uncertainties due to the truncation effects and the choice of scattering factors are found to have little influence on the RDF at intermolecular distances.
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页数：10
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