Observations of Continuum Depression in Warm Dense Matter with X-Ray Thomson Scattering
Observations of Continuum Depression in Warm Dense Matter with X-Ray Thomson Scattering
复制标题
DOI：
10.1103/physrevlett.112.145004
复制
发表时间：
2014-04-10
影响因子：
8.6
通讯作者：
Glenzer, S. H.
中科院分区：
文献类型：
--
作者：
Fletcher, L. B.;Kritcher, A. L.;Glenzer, S. H.
详细测量的电子密度，温度和电离状态的压缩CH壳接近压力为50毫巴的光谱分辨X射线散射实现。激光产生的9 keV的X射线探测等离子体在三冲击聚结的瞬态。高信噪比的X射线散射光谱显示了在电子密度n（e）> 10（24）cm（-3）的高度简并的温暖致密物质态中连续谱降低的直接证据。测量的密度和温度与辐射流体动力学模型一致时，会计连续降低计算，采用详细的配置会计。
Detailed measurements of the electron densities, temperatures, and ionization states of compressed CH shells approaching pressures of 50 Mbar are achieved with spectrally resolved x-ray scattering. Laser-produced 9 keV x-rays probe the plasma during the transient state of three-shock coalescence. High signal-to-noise x-ray scattering spectra show direct evidence of continuum depression in highly degenerate warm dense matter states with electron densities n(e) > 10(24) cm(-3). The measured densities and temperatures agree well with radiation-hydrodynamic modeling when accounting for continuum lowering in calculations that employ detailed configuration accounting.