MICROSCOPIC THEORY OF HIGH-FREQUENCY TRANSIENT RADIATION IN THE GRAZING-INCIDENCE OF A PARTICLE ON AN INTERFACE

Within the framework of the microscopic approach, we develop the theor y of transient radiation in the grazing incidence of a charged particl e on an interface. The influence of specific features of the electron density on the surface of a medium on transient radiation is investiga ted. It is demonstrated that in the case of the grazing incidence of a charged particle on a surface, transient radiation generated by the s urface polarization current may have a higher intensity than transient radiation due to microinhomogeneities in the bulk of a medium.