Observation of Channeling Radiation from Relativistic Electrons

Abstract

Radiation from 56- and 28-MeV electrons channeled along major plances or along a major axis of an 18-\ensuremath{\mu}-thick silicon crystal has been observed. Unpredicted spectral peaks in the range from 10 to 130 keV were observed and resolved for planar-channeling electrons, whereas only a large low-energy enhancement was seen for axial-channeling electrons.