The hydrogen plasma is studied at temperatures T∼104-106 K using the free energy minimization method. A simple analytic free energy model is proposed which is accurate at densities ρ≲1 g cm-3 and yields the convergent internal partition function of atoms. The occupation probability formalism is modified for solving the ionization equilibrium problem. The ionization degree and equation of state are calculated and compared with the results of other models.
Physics of Plasmas
- Pub Date:
- November 1996
- Physics - Plasma Physics;
- 11 pages, REVTeX, 5 embedded PostScript figures (necessary sty-files included), tarred, gzipped. Accepted for Physics of Plasmas