Peculiarities of Cherenkov and Transition Radiation in a Finite-Size Absorbing Medium

Abstract

Based on the equations of macroscopic electrodynamics, the spectral-angular characteristics of electromagnetic radiation are considered, which is generated during the passage of fast, charged particles through a finite-size absorbing medium. The variation in the angular distribution of the radiation overcoming the Cerenkov radiation threshold is investigated, the contribution from the generated transition radiation is analyzed at high particle energies and so are the spectral characteristics of the Cerenkov radiation within the X-ray frequency range.