Abstract

An equation of state of a gas of electrons of dense matter at high pressure is proposed with basis on the Thomas-Fermi theory by taking into account a modification of an adiabatic relation. The formulation is applied to describe the behavior of the concentrations of alkali metals subjected to pressure excesses up to 100,000kgf/cm2. The outcomes suggest a mechanism to explain the observed concentration discontinuity of Cesium. Also predicted are the values of the pressure excesses at which the concentrations of the remaining alkalies shall exhibit the same behavior as that of Cesium. The results may be of interest in the search for exoplanets, development of new materials, geologic metamorphism, among other related lines of investigation.

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