X-ray Thomson scattering on shocked graphite

被引：8
|
作者：
Kraus, D. [1 ]
Otten, A. [1 ]
Frank, A. [1 ]
Bagnoud, V. [2 ]
Blazevic, A. [2 ]
Gericke, D. O. [3 ]
Gregori, G. [4 ]
Ortner, A. [1 ]
Schaumann, G. [1 ]
Schumacher, D. [3 ]
Vorberger, J. [3 ]
Wagner, F. [1 ]
Wuensch, K. [3 ]
Roth, M. [1 ]
机构：
[1] Tech Univ Darmstadt, Inst Kernphys, D-64289 Darmstadt, Germany
[2] GSI Helmholtzzentrum Schwerionenforsch GmbH, D-64291 Darmstadt, Germany
[3] Univ Warwick, Ctr Fus Space & Astrophys, Dept Phys, Coventry CV4 7AL, W Midlands, England
[4] Univ Oxford, Dept Phys, Oxford OX1 3PU, England
来源：
HIGH ENERGY DENSITY PHYSICS | 2012年 / 8卷 / 01期
基金：
英国工程与自然科学研究理事会;
关键词：
Warm dense matter; Liquid carbon; Hexagonal diamond; X-ray Thomson scattering; Laser-driven shock wave; CARBON;
D O I：
10.1016/j.hedp.2011.11.011
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
We present measurements of the changes in the microscopic structure of graphite in a laser-driven shock experiment with X-ray scattering. Laser radiation with intensities of similar to 2 x 10(13) W/cm(2) compressed the carbon samples by a factor of two reaching pressures of similar to 90 GPa. Due to the change of the crystalline structure the scattered signals of the probe radiation were modified significantly in intensity and spectral composition compared to the scattering on cold samples. It is shown that the elastic scattering on tightly bound electrons increases strongly due to the phase transition whereas the inelastic scattering on weakly bound electrons remains nearly unchanged for the chosen geometry. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：46 / 49
页数：4
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