RADIATION OF SLOW ELECTROMAGNETIC-WAVES IN AN ISOTROPIC MEDIUM WITH SPATIAL-DISPERSION

This paper discusses the distinctive features of radiation of electrom agnetic waves with anomalously large values of the wave vector and sma ll phase velocity that exist near narrow absorption lines. The distrib ution of radiated energy with respect to angle and frequency is calcul ated for Cerenkov radiation and bremsstrahlung of the slow waves. It i s shown that the angular distribution of the slow-wave bremsstrahlung exhibits a characteristic maximum in the direction perpendicular to th e plane of motion of the particles. (C) 1997 American Institute of Phy sics.