Coherent bremsstrahlung in periodically deformed crystals with a complex base

TL;DR

This paper investigates how periodic deformations in complex-base crystals affect the coherent bremsstrahlung of high-energy electrons, deriving formulas and analyzing conditions where deformation impacts the radiation process.

Contribution

It provides a new formula for the differential cross-section of bremsstrahlung in deformed crystals with complex bases, considering arbitrary deformation fields.

Findings

Deformation can enhance or reduce bremsstrahlung cross-section depending on parameters.

Derived a general expression for the differential cross-section in deformed crystals.

Analyzed the impact of small-angle electron entry on bremsstrahlung behavior.

Abstract

In the present paper we investigate coherent bremsstrahlung of high energy electrons moving in a periodically deformed single crystal with a complex base. The formula for corresponding differential cross-section is derived for an arbitrary deformation field. The conditions are discussed under which the influence of the deformation is important. The case is considered in detail when the electron enters into the crystal at small angles with respect to a crystallographic axis. It is shown that in dependence of the parameters, the presence of the deformation can either enhance or reduce the bremsstrahlung cross-section.