Critical point and mechanism of the fluid–fluid phase transition in warm dense hydrogen

The density functional theory is used to calculate the equation of state and the proton–proton pair correlation functions in the range of hydrogen temperatures and densities where the fluid–fluid phase transition is expected. The metastable states are considered. The critical temperature has been es...

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Bibliographic Details
Published in:Doklady. a journal of the Russian Academy of Sciences. Physics 2017-06, Vol.62 (6), p.294-298
Main Authors: Norman, G. E., Saitov, I. M.
Format: Article
Language:English
Subjects:
Classical Mechanics
Critical point
Critical temperature
Density functional theory
Hydrogen
Ionization
Mathematical and Computational Physics
Phase transitions
Physics
Physics and Astronomy
Theoretical
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Summary:The density functional theory is used to calculate the equation of state and the proton–proton pair correlation functions in the range of hydrogen temperatures and densities where the fluid–fluid phase transition is expected. The metastable states are considered. The critical temperature has been estimated to be ~4000 K. We propose a two-step mechanism: the partial ionization of molecules to produce H 2 + ions at the phase transition followed by the formation of H 3 + ions.
ISSN:1028-3358
1562-6903
DOI:10.1134/S1028335817060088