J. Phys. IV France 10 (2000) Pr5-287-Pr5-289
A new equation of state for shock-compressed liquid deuteriumP. Arnault1, J.M. Caillol2, D. Gilles1, P. Legrand1, F. Perrot1 and F. Renard1
1 Commisariat à l'Énergie Atomique, BP. 12, 91680 Bruyères-le-Châtel, France
2 MAPMO, UMR 6628 du CNRS, Université d'Orléans, 45067 Orléans cedex 2, France.
A new theoretical model for the equation of state of deuterium is proposed. It is based mainly on a non linear mixing law of a molecular phase and a metallic plasma phase. This law is shown to have a large effect on the mixture EOS either with Sesame or Ross approximations for the pure phases. In addition to the non linear mixing law, a Rosslike model in which the free energy of the bare OCP in the metallic plasma phase is replaced by the free energy of a plasma of ions interacting by Yukawa potentials fits the Nova experiments fairly well, without containing any empirical parameter.
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