Energy losses by charged particles

Studied are analytically energy losses of charged particles on ionization and excitation in a thin layer of gaseous substance. Derived are different representations of the kinetic equation total solution for the distribution function of energy losses. The results obtained are combined with the known theory of interaction of a charged particle with medium atoms. Revealed is the asymptotic conversion of formulae with the increasing layer thickness in the Landau distribution. The results of detailed calculations are presented along with their comparison with the experimental data