X-ray Thomson scattering in warm dense matter

被引：0
|
作者：
A. Höll
R. Redmer
G. Röpke
H. Reinholz
机构：
[1] Argonne National Laboratory,Physics Division
[2] Universität Rostock,Fachbereich Physik
[3] The University of Western Australia,Department of Physics
来源：
The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics | 2004年 / 29卷
关键词：
Structure Factor; Diagnostic Tool; Standard Treatment; Free Electron; Dynamic Structure;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
The scattering of photons in plasmas is an important diagnostic tool. Especially, the region of warm dense matter can be probed by X-ray Thomson scattering. The scattering cross-section is related to the dynamic structure factor \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$S(k,\omega)$\end{document}. We improve the standard treatment of the scattering on free electrons within the random phase approximation (RPA) by including collisions. The dielectric function is calculated in the Born-Mermin approximation. The inclusion of collisions modifies the dynamic structure factor significantly in the warm dense matter regime. We conclude that a theoretical description beyond the RPA is needed to derive reliable results for plasma parameters from X-ray Thomson scattering experiments.
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页码：159 / 162
页数：3
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