ON THE DENSE-PLASMA REFLECTIVITY AND SKIN DEPTH AT STRONG-COUPLING

The problem of skin depth and Fresnel reflectivity is addressed for de nse strongly coupled plasmas (sep). Frequencies are considered which a re less than or close to the electron plasma frequency both for classi cal and degenerate sep. For classical sep the calculations go beyond t he Born approximation for the dynamic collision frequency. The correla tion effects are treated through the dynamic local field corrections, whose role turns out to be essential at high values of plasma coupling parameter. Preliminary data for degenerate dense plasmas are compared with the results obtained for classical sep. The effect of a radiatio n 'cut-off' near the plasma frequency turns out to be less pronounced in classical sep due to the more collision-dominated nature of this pl asma, in comparision with weakly non-ideal or strongly degenerate plas mas. Available related experimental and molecular dynamics data are pr esented and analysed for comparison with the developed theory.