Radiation from multi-GeV electrons and positrons in periodically bent silicon crystal

Victor G Bezchastnov, Andrei V Korol, Andrey V Solov'yov
2014 Journal of Physics B: Atomic, Molecular and Optical Physics  
A periodically bent Si crystal is shown to efficiently serve for producing highly monochromatic radiation in a gamma-ray energy spectral range. A short-period small-amplitude bending yields narrow undulator-type spectral peaks in radiation from multi-GeV electrons and positrons channeling through the crystal. Benchmark theoretical results on the undulator are obtained by simulations of the channeling with a full atomistic approach to the projectile-crystal interactions over the macroscopic
more » ... gation distances. The simulations are facilitated by employing the MBN Explorer package for molecular dynamics calculations on the meso- bio- and nano-scales. The radiation from the ultra-relativistic channeling projectiles is computed within the quasi-classical formalism. The effects due to the quantum recoil are shown to be significantly prominent in the gamma-ray undulator radiation.
doi:10.1088/0953-4075/47/19/195401 fatcat:rib4lqcjafhbvn3nbawky2dfdi