A method based on the Hartree Fock slater self consistent average atom model is employed to calculate opacities of medium and high Z materials. Comparisons with other theoretical results and experiments show that this model is reasonable.

Using the relativistic self-consistent average-atom model,electron scattering resonances in hot plasma have been studied.For AI plasma at solid density and temperature T=10eV,40eV,70eV,100eV,the resonance scattering structure of phase shift,state density and scattering cross section is given,and the influence upon the dlectron conduction produced by resonance scattering is illuminated by comparing the calculated results with experimental ones.

An average-atom(AA) model is employed to calculate differential cross sections for the elastic scattering of electrons from argon and iron plasmas.The results are in good agreement with other theoretical calculations and available experimental data in the low temperature and density limit.Numerical simulations show that the effect from temperature is more complicated than that from density,and differential cross sections change greatly with the condition of the plasma.

This paper is based on the relativistic self-consistent ion-sphere model. The densi-ty and the continuum wave function are determined consistently with the model. The free-free Gaunt factor is calculated by using partial wave phase-shift method, and the results are compared with the predictions of the Born-Elwert approximation.