At passage of an ultra-high-energy particle through a bent crystal coherent bremsstrahlung is emitted but with characteristic frequencies distributed continuously, in relation with the crystal bend profile. For practical crystals, such radiation can be calculated by the stationary phase approximation technique. The radiation spectrum averaged over the impact parameters is evaluated. Its charact...

In a previous paper we have calculated the decay τ → πντγ. We used a given relative sign between the internal bremsstrahlung and the structure dependent radiation, which has been used by several other authors before. However, we believe that there are good arguments why the opposite sign is the physical one. We briefly discuss these arguments and then investigate how the predictions for the dec...

The first-order bremsstrahlung emission spectrum is αdω/ω at zero temperature. If the radiation is emitted into a region that contains a thermal distribution of photons, then the rate is increased by a factor 1 +N(ω) where N(ω) is the Bose-Einstein function. The stimulated emission changes the spectrum to αTdω/ω for ω ≪ T . If this were correct, an infinite amount of energy would be radiated in...

The results of experimental studies on the generation x-rays when operating a piezoelectric kitchen lighter in vacuum are presented. For first time, new method for increasing intensity x-ray radiation effect high through use an additional electron emitter is proposed and demonstrated. maximum energy bremsstrahlung reaches 14 keV. This means that electrons accelerated field ceramic to at least

In the discussion that follows, we assume that gamma rays are the radiation of interest. The principles discussed also apply to monoenergetic x rays; in many cases of concern in x-ray shielding, however, the photons are produced in the bremsstrahlung process that yields a wide and continuous distribution of photon energies. Specialized shielding approaches have been developed to carry out shiel...

The design for the proto type of the Shanghai Laser Electron Gamma Source (SLEGS) at the Shanghai Synchrotron Radiation Facility (SSRF) is introduced. Some detailed descriptions for design of related instruments are provided. The proto type can produce X-ray with energy of 10 keV order. A description of the kinematics of Compton backscattering mechanism and the related simulation results are pr...