SEMILLAC II: A new model for spectral behavior of hot plasmas

Radiative properties of plasmas are of fundamental importance in many physical fields such as laser plasma interactions and astrophysical plasmas. In this paper we present a new model developed to be used with radiation-hydrodynamic codes. This requires a fast calculation of the opacities and emissivities for a wide range of plasma conditions. This model is based on a limited set of detailed MCDF calculations, extended to a wider set of atomic configurations using simple algebraic relations. The model uses similar principles to those used in the SEMILLAC population dynamics code [1]. The model can be used in local thermal equilibrium and non local thermal equilibrium conditions. Results are presented for emission and absorption spectra as well as for average radiative properties.