Metallic Hydrogen as an Alkali Metal. The Equation of State
V. T. Shvets
Odesa National Academy for Food Technologies, 1/3 Dvoryanska Str., 65082 Odesa, Ukraine
Received: 09.12.2019. Download: PDF
The pair effective proton-proton interactions and equation of state of liquid metallic hydrogen are calculated in a wide range of densities and temperatures. For this, a perturbation theory on the potential of electron-proton interaction is used. In all cases, calculations are carried out with regard to members of the third-order perturbation theory, which today is the maximum possible accuracy of calculations. For conduction electrons the random phase approximation is used. Their exchange interaction and correlation taken into account in local field approximation. For proton subsystem the hard spheres model is used. Their diameter is one of the fitting parameters of this theory. Hard sphere diameter and parking fraction are obtained from the analysis of the pair effective proton-proton interaction. In all the above cases, the role of the third order members is significant. The investigated ranges of density and temperature correspond to the conditions observed in the central part of the gas giant planets. Analysis of the results indicates the possible existence of the solid core of the planets of Jupiter group, caused by crystal state of metallic hydrogen.
Key words: equation of state of metallic hydrogen, hydrogen metallization, thermodynamics of metallic hydrogen, pair effective interaction between protons.
PACS: 05.30.Fk, 05.70.Ce, 05.70.Fh, 61.50.Ks, 71.10.Ca, 72.10.Bg
Citation: V. T. Shvets, Metallic Hydrogen as an Alkali Metal. The Equation of State, Metallofiz. Noveishie Tekhnol., 42, No. 7: 901—917 (2020) (in Ukrainian)