INFLUENCE OF NONIDEAL EFFECTS OF DENSE-PLASMA ON SOLAR INTERIOR OPACITY

The effects of dense plasma on radiative opacities are investigated fo r solar interior conditions. Atomic configuration probabilities are fo rmulated, using the grand partition function of electrons, to include the occupation probability for interpreting pressure ionization of the atomic configuration. Also included are the effects of the screening of charged particles and the degeneracy of electrons on electron scatt ering and atomic absorption. The numerical calculations show that the screening effect of charged particles reduces the solar opacity by les s than Delta log kappa = 0.027, and the effect of electron degeneracy reduces it by less than Delta log kappa = 0.0023. The uncertainty in t he occupation probability for heavy element atoms can change the solar opacity by up to Delta log kappa = 0.14.