Equation of state of weakly nonideal hydrogen plasmas with account of convergent partition function for atoms and molecules

摘要

Convergent partition function (PF) for atomic and molecular bound states with account of the electrons degeneracy are derived for weakly non-ideal hydrogen plasmas. Corrections due to charged-neutral particles interactions are also described. These contributions were realized in the model equation of state (EOS) of hydrogen plasmas and the HEOS code. The physical model EOS also includes the Coulomb and diffraction corrections, contributions of the scattering states, electron and ion interactions, and the radiation pressure. The calculated dependences of the heat capacity and the ionization degree in the low temperature range and partial pressures for conditions of the solar plasma are presented.