X-ray and γ-ray emission from channeled relativistic electrons and positrons

Abstract
The characteristics of the radiation from channeled relativistic electrons and positrons are discussed and model calculations carried out. Radiation near 2.5 keV associated with transitions etween the 2 p→1s eigenstates of 2‐MeV electrons channeled along the 〈110〉 axis of MgO is predicted with 50 times the usual bremsstrahlung intensity in a 10% bandwidth. Recent low‐energy bremsstrahlung measurements made with 28‐MeV electrons propagating along an axis in silicon are interpreted in terms of this model.