http://arxiv.org/abs/1312.7537
Anomalous features for hypothetical Plasma Phase Transitions (PPT), which is expected to occur in mixed hydrogen-helium plasma in interior of Jupiter and Saturn, are under discussion. The characteristics of the Coulomb and density corrections (the so-called non-ideality corrections) are reconstructed for hydrogen-helium plasma in the vicinity of phase coexistence boundary of this PPT in version of Saumon and Chabrier, using tabular data for hydrogen-helium EOS of Saumon, Chabrier and VanHorn and some general thermodynamic relations. Two previously unknown characteristics of the studied PPT have been estimated based on these results: (i) — the jump of the electrostatic potential across the phase boundary of PPT (Galvani potential), and (ii) — the scale of non-congruency for this PPT (the differences in chemical composition of the coexisting hydrogen-helium phases), which could be expected in H2/He mixture at typical parameters of plasma in interior of Jupiter and Saturn. While the first effect — the potential of phase boundary — turned out to be within the typical scale of contact electrochemical potentials, $\Delta \varphi$ ~ 1-2 eV, the second quantity — the PPT non-congruency — proved to be considerable under Saturn and Jupiter conditions.
Tue, 31 Dec 13
17/49
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