Comparison of the SLAC experimental data on the radiation of planar channeled positrons with theory taking into account the medium polarization

It is carried out a comparison between the experimental data of the YerPhI-KhPhTI-SLAC collaboration on radiation of 6 and 10 GeV positrons channeled in the (1 1 0) crystallographic planes of diamond with thicknesses 600 and 84 μm, correspondingly, and theory taking into account the medium polarization. It is shown that the theory with medium polarization describes the experimental results better than other theories without medium polarization.