Opacity calculations for dense plasmas

A code has been developed for calculating opacities of hot dense plasmas. This uses the average atom model to calculate the frequency dependent opacities with contributions from bound-bound, bound-free, free-free and scattering processes. In this paper, we report work in three areas. Firstly, we present the enhanced absorption found in certain photon energy regions with the use of screening coefficients with 1-splitting in comparison to those obtained without 1-splitting. Secondly, we have generalized the code to allow mixture of elements, albeit without molecular effects. Thirdly, we compare our code results with other codes and experimental data. (orig.)