Condensed Matter Physics, 1995, No. 6, p. 35-48, English
DOI:10.5488/CMP.6.35
Title: Equilibrium properties of the
gas of atoms of which a part is excited
within cluster expansion method
Autors: O.Derzhko, R.Levitskii, O.Chernyavskii
A gas of atoms some of which are in excited electronic state is under
consideration. Since the lifetime of an excited state is to great extent
larger than the time required for establishing the equilibrium over
translational degrees of freedom the system possesses equilibrium properties.
They are determined essentially by many-particle resonance interactions that
appear in the system of identical differently excited atoms.
The present paper contains the results of numerical calculations
dealing with the examination of virial state equation
and density expansion for
canonical pair spatial distribution function
of the system in question with the accuracy up to
three-particle contributions. The obtained results permit to study the
excited
atoms influence on gas-liquid phase transition and the excimer
molecules formation in the gas with excited atoms.