How intense is parametric x radiation?

Abstract

We have measured the crystal-angle dependence and the intensity of the parametric x radiation from a Si single crystal impinged upon by an electron beam with the energy ranging from 200 to 1100 MeV. It has been found that the x-ray intensity is higher and the angular spread is less broad than the predictions of the theoretical model due to Feranchuk and Ivashin. This calls for a more elaborate theoretical treatment of multiple scattering, and encourages research aiming at a new type of x-ray source based on the parametric x-radiation mechanism.