arXiv subjects

A. S. Shumikhin

Publications and source records attributed to A. S. Shumikhin.

3 recordsLinked to original sources

arXiv2020

Is the atomic metal vapor a dielectric state?

We propose a simple method for calculating the metal vapor conductivity at the critical point and near-critical isotherms. This method's base is the hypothesis of an electron jellium's existence as an origin of the conduction band in metal vapor's gaseous phase. Satisfactory agreement with the experimental data for alkali metals (Cs, Rb) concludes that the "cold ionization" mechanism is possible in the critical point's vicinity. The liquid metal-dielectric transition, as previously thought, does not occur; but the liquid metal-gaseous metal transition occurs probably. The gaseous metal is not a dielectric state of the metal.

physics.plasm-ph↗

arXiv2014

The Anomalous Compressibility and Metallization of Deuterium under Shock-Wave Compression

High values of deuterium compressibility under shock-wave compression, recently discovered in several experiments, are explained by an unusual dielectric-metal phase transition from a dense molecular gas into a liquid-metal atomic gas. This phase transition recently described by authors was named the dissociative phase transition (DPT). The same phase transition describes a significant scattering of experimentally measured densities within an area of anomalous compressibility.

physics.plasm-ph↗

arXiv2004

Basic Chemical Models of Nonideal Atomic Plasma

The concept of basic chemical models is introduced, which is new from the standpoint of the physics of nonideal atomic plasma. This concept is based on the requirement of full conformity of the expression for free energy in the chemical model of plasma to exact asymptotic expansions obtained in the grand canonical ensemble within the physical model of plasma. The thermodynamic functions and equations of state and ionization equilibrium are obtained for three basic chemical models differing from one another by the choice of the atomic partition function. Comparison is made with the experimental results for nonideal plasma of cesium and inert gases. It is demonstrated that the best fit to experiment is shown by the results obtained using a basic chemical model with atomic partition function in the nearest neighbor approximation with classical determination of the size of excited atom.

physics.plasm-ph↗