One-electron model of the high-frequency dielectric function of dense plasmas

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Lankin, A.V.^1 ; Norman, G.E.^1 ; Saitov, I.M.^1

Joint Institute for High Temperatures, Russian Academy of Sciences, Izhorskaya 13, Moscow

125412, Russia^1

关键词: Dense plasma;    Electron models;    Finite width;    High-frequency dielectrics;    Kubo-Greenwood formula;    Low density;    One-electron waves;    Shock fronts;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012112/pdf
DOI  :  10.1088/1742-6596/653/1/012112

来源: IOP

【 摘 要 】

The approach is developed to calculate reflectivity and high-frequency dielectric permeability of dense plasmas. The Kubo-Greenwood formula is applied. One-electron wave functions are used. Plane waves are substituted for the wave functions of the free states. Hydrogen-like wave functions are substituted for the wave functions of the bound states. The restriction of the excited pair bound states is included in the approach. Calculations are performed for the shock-compressed xenon. The results are in the fair agreement with the experimental data for densities ρ > 2 g/cm3whereas the remarkable discrepancy appears at low densities. The discrepancy can be attributed to a finite width of the shock front. The width increases with the decrease of density and can contribute to the reflectivity at low densities.