Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
Phys Rev Lett. 2010 Aug 13;105(7):075003. doi: 10.1103/PhysRevLett.105.075003. Epub 2010 Aug 12.
We present the first measurements of the plasmon dispersion and damping in laser shock-compressed solid matter. Petawatt laser produced K-α radiation scatters on boron targets compressed by a 10 ns-long 400 J laser pulse. In the vicinity of the Fermi momentum, the scattering spectra show dispersionless, collisionally damped plasmons, indicating a strongly coupled electron liquid. These observations agree with calculations that include the Born-Mermin approximation to account for electron-ion collisional damping and local field corrections reflecting electron-electron correlations.
我们首次测量了激光冲击压缩物质中的等离子体色散和阻尼。皮秒激光产生的 K-α 辐射在被 10 ns 长的 400 J 激光脉冲压缩的硼靶上散射。在费米动量附近，散射光谱显示无色散、碰撞阻尼的等离子体，表明电子液体具有强烈的耦合。这些观察结果与包括 Born-Mermin 近似以解释电子-离子碰撞阻尼和反映电子-电子相关的局部场修正的计算结果一致。
