X-Ray Scattering Measurements of Strong Ion-Ion Correlations in Shock-Compressed Aluminum
X-Ray Scattering Measurements of Strong Ion-Ion Correlations in Shock-Compressed Aluminum
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DOI：
10.1103/physrevlett.110.065001
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发表时间：
2013-02-05
影响因子：
8.6
通讯作者：
Glenzer, S. H.
中科院分区：
文献类型：
--
作者：
Ma, T.;Doeppner, T.;Glenzer, S. H.
强离子-离子相关峰特征的温暖的致密物质（WDM）的第一次观察到使用同时角，时间和光谱分辨的X射线散射测量在激光驱动的冲击压缩铝。采用能量为17.9 keV的激光产生的钼X射线线发射来探测被压缩到ρ> 8 g/cm（3）的密度的铝。在波数k = 4.0埃（-1）处，我们观察到静态结构因子的一个非常明显的峰。该相关峰的大小和位置的测量是足够精确的，以测试不同的理论模型的离子结构，并表明，只有考虑到WDM中的复杂相互作用的模型与数据一致。这也证明了一种新的高度准确的诊断方法，可以直接测量温暖致密物质的压缩状态。DOI：10.1103/PhysRevLett.110.065001
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