Nonequilibrium statistical thermodynamics of positronium atoms moving in solids

Abstract

We calculate the quasitemperature of positronium atoms moving in a solid in the framework of nonequilibrium statistical thermodynamics. We represent the quasitemperature in the form of the renormalized temperature of the thermostat. The renormalization results from taking the positronium formation rate, the kinetic effects of interaction, and the dynamical effects of collisions into account. We obtain an expression for the thermalization time of positronium atoms.

Two stages of motion of anharmonic oscillators modeling fast particles in crystals

“…To construct the equation of motion for function (13), we consider the joint action of inelastic scattering (10) and anharmonic part (12) on the particles. It is easy to show that this equation contains higher-order Green's functions, in particular, the function [a + s (t)a s (t), H 2 (t)]; B .…”

“…In this formula, K(F 21 ) ∼ (e F21 U0 + 1) −1 is a statistical factor depending on 1/F 21 , i.e., on the transverse CP quasitemperature [13]; 1 τ ε ⊥ (β 1 )…”