Concentration discontinuity of alkalies at high pressures

Author(s)

Silveira, F. E. M. ^[1] ; Camargo, R. S. ^[2] ; Caldas, I. L. ^[3]

Affiliation

^[1] Univ Fed ABC, Ctr Ciencias Nat & Humanas, Rua Santa Adelia 166, BR-09210170 Santo Andre, SP - Brazil

^[2] Univ Fed Espirito Santo, Ctr Tecnol, Ave Fernando Ferrari 514, BR-29075910 Vitoria, ES - Brazil

^[3] Univ Sao Paulo, Inst Fis, Rua Matao 1371, Cidade Univ, BR-05508090 Sao Paulo, SP - Brazil

• Document type: Journal article
• Source: Physics Letters A; v. 395, APR 16 2021.
• Web of Science Citations: 0

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 100,000 kgf/cm(2). 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. (C) 2021 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 18/03211-6 - Non linear dynamics
• Grantee: Iberê Luiz Caldas
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 17/20192-2 - Stability Analysis in Large Aspect Ratio Tokamaks: Current Finite Relaxation due to Electrons Inertia
• Grantee: Francisco Eugenio Mendonça da Silveira
• Support Opportunities: Regular Research Grants