The effects of defects on channeling radiation

The spectral features of the electromagnetic radiation emitted from relativistically fast positrons and electrons channeled along major crystallographic directions and planes are very sensitive to the interatomic potential assumed between the projectile and the target crystal. The effects are investigated of platelets present in diamond type Ia on the channeling radiation by assuming a simple model for these defects, as seen from (100), (110), and (111) planar directions. The results are qualitatively correct and for (110) planar channel, quantitative agreement with the experimental results is also satisfactory. (author)