Application of the Ursell-Mayer method in the theory of spin-polarized atomic hydrogen

Employing the Ursell-Mayer method and Ljolje semi-free gas model analytic relations describing ground state properties (energy, pressure, compressibility, sound velocity, radial distribution function and one-particle density matrix) of spin-polarized atomic hydrogen were derived. The expressions are valid up to density 2 1026 atoms/m3. It was found out that at density of 2 1026 atoms/m3 the condensation of particle in momentum space is 88% (at absolute zero). (orig.)