X-Ray Scattering Measurements of Strong Ion-Ion Correlations in Shock-Compressed Aluminum

被引：78
|
作者：
Ma, T. [1 ]
Doeppner, T. [1 ]
Falcone, R. W. [2 ]
Fletcher, L. [2 ]
Fortmann, C. [1 ,3 ]
Gericke, D. O. [4 ]
Landen, O. L. [1 ]
Lee, H. J. [5 ]
Pak, A. [1 ]
Vorberger, J. [4 ]
Wuensch, K. [4 ]
Glenzer, S. H. [1 ]
机构：
[1] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
[2] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA
[3] Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA
[4] Univ Warwick, Dept Phys, Ctr Fus Space & Astrophys, Coventry CV4 7AL, W Midlands, England
[5] SLAC Natl Accelerator Lab, Menlo Pk, CA 94309 USA
来源：
PHYSICAL REVIEW LETTERS | 2013年 / 110卷 / 06期
基金：
英国工程与自然科学研究理事会;
关键词：
PLASMAS; CRYSTALS;
D O I：
10.1103/PhysRevLett.110.065001
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
The strong ion-ion correlation peak characteristic of warm dense matter (WDM) is observed for the first time using simultaneous angularly, temporally, and spectrally resolved x-ray scattering measurements in laser-driven shock-compressed aluminum. Laser-produced molybdenum x-ray line emission at an energy of 17.9 keV is employed to probe aluminum compressed to a density of rho > 8 g/cm(3). We observe a well pronounced peak in the static structure factor at a wave number of k = 4.0 angstrom(-1). The measurements of the magnitude and position of this correlation peak are precise enough to test different theoretical models for the ion structure and show that only models taking the complex interaction in WDM into account agree with the data. This also demonstrates a new highly accurate diagnostic to directly measure the state of compression of warm dense matter. DOI: 10.1103/PhysRevLett.110.065001
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收藏
页数：5
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