Communication: Shock adiabat of atomic nitrogen at megabar pressures

Abstract

We use spherical cellular method combined with a self-consistent density functional approach (quasizone method) to calculate the band structure and bulk properties of atomic nitrogen at megabar pressures and densities 3.2÷3.6 g/cm3. Thermodynamic functions and shock adiabat calculated by this method correspond to recent measurements, showing a sharp increase in pressure along the shock adiabat in this range of densities.

Investigation of the phase transitions in cesium by the average atom model

“…For describing of the physical processes and phenomena in these conditions, it is necessary to have mathematical models of the state of matter. Particularly, the chemical [4][5][6] and quantum-statistical models [7][8][9] are used.…”

“…Here are preferred quantum-statistical cell models with boundary conditions, borrowed from the theory of solids. One such model is the average atom (AA) model [7][8][9][10]. This is a spherical cell model, combined with a self-consistent approximation of the density functional and Bloch boundary conditions.…”