The dynamics of the motion and radiation from electrons during axial quasi-channeling

The spectral characteristics of radiation from relativistic electrons axially quasi-channeled in thick single crystals are investigated. In the peak region, the spectral radiation intensity of the channeled electrons exceeds that of the quasi-channeled ones by several times; this is due to the rapid diffusion of the quasi-channeled electrons over the transverse energies. The main contributors to the hard region of the spectrum are the superbarrier electrons.