Coherent bremsstrahlung at low energies

Abstract
We present a calculation of coherent bremsstrahlung of electrons (or positrons) from crystal targets, which is based on the lowest Born approximation but does not make use of the high-energy or small-angle approximation. Accordingly, the results remain valid down to electron kinetic energies of the order of ≥ 1 MeV, and are applicable to several experiments that have been carried out in recent years using electrons with kinetic energies of a few MeV or tens of MeV.