ON DENSE HYDROGEN AND NOBLE-GASES PLASMA SPECTRA

In the optical properties of a plasma, nonideality manifests itself in the deformation of the energy spectrum of radiating particles. In par ticular, it can influence the character of light absorption (emission) and energy transfer both in dense plasma of astrophysical objects and terrestrial applications [1,2]. The effects of nonideality on the abs orption coefficients in a strongly coupled plasma (SCP) may be conside red as a consequence of two main physical causes. The first is the str ong action of quasistatic (F-0 similar to n(i)(2/3)) and dynamic (E(0) similar to n(e)(1/2)) electric field on atoms and ions immersed in a dense plasma. We mean by this both individual and collective fields, i ncluding cases of suprathermal plasmas and ion-acoustic waves. The sec ond source of nonideal effects is the strong Coulomb correlations betw een the free charges. In this paper some aspects of dense plasma light absorbtion are discussed, and an attempt is made to analyze the avail able and new experimental data for dense hydrogen and noble gas plasma s to clarify the density effects in opacity.