Abstract
A simple physical model is proposed for dissociating dense fluid hydrogen. We propose that free dissociated atoms interact via quantum electron-electron exchange analogously to the interaction in the liquid-metal phase of alkali metals. The density dependence of a hydrogen atom’s binding energy in such a quasi-liquid is calculated. It is shown that the transition from the molecular fluid to liquid hydrogen is a first-order phase transition. The critical parameters of the transition are determined: P c = 72 GPa, T c = 10500 K, and ρ c = 0.5 g/cm3. The possibility of the metastable existence of atomic liquid hydrogen in a dissociated molecular fluid under decreased pressure is established.
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Original Russian Text © A.L. Khomkin, A.S. Shumikhin, 2012, published in Zhurnal Eksperimental’noi i Teoreticheskoi Fiziki, 2012, Vol. 141, No. 1, pp. 101–108.
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Khomkin, A.L., Shumikhin, A.S. Dissociation and dissociative phase transition in dense hydrogen. J. Exp. Theor. Phys. 114, 89–95 (2012). https://doi.org/10.1134/S1063776111150052
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DOI: https://doi.org/10.1134/S1063776111150052