Abstract
The Poisson adiabat (isentrope) for deuterium has been calculated near a density jump observed in the experiment. The authors think that this density jump is related to a phase transition. A distinctive feature of the computational model is taking account of the collective energy of atomic bonds (cohesion) and excluded volume. Computation data demonstrate the presence of a phase transition and a density jump on the isentrope. Earlier, a similar phase transition, dissociative phase transition, was observed in calculations of the Hugoniot adiabat for deuterium. A hypothesis has been put forward for the presence of a new class of phase transitions, dissociative transitions and plasma transitions, with the same topology of phase characteristics. Such phase transitions were first observed by Norman and Starostin [12, 13].
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Khomkin, A.L., Shumikhin, A.S. New Class of Phase Transitions in Hydrogen and Deuterium Experiencing Chemical Reactions of Ionization and Dissociation. J. Exp. Theor. Phys. 134, 197–203 (2022). https://doi.org/10.1134/S1063776122020066
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DOI: https://doi.org/10.1134/S1063776122020066