Parametic x-radiation in a mosaic crystal of pyrolytic
Amosov K. Yu., Andreyashkin M. Yu., Verzilov V. A., Vnukov I. E., Zabaev V. N., Kalinin B. N., Kaplin V. V., Kustov D. V., Naumenko G. A., Pivovarov Yu. L., Potylitsyn A. P., Rozum E. I., Uglov S. R., Moran M.
Anomalously high orders of parametric x-radiation of 900-MeV electrons in a crystal of pyrolytic graphite have been observed experimentally at the Tomsk synchrotron. This observation supports results found by Fiorito et al. [Phys. Rev. Lett. 71, 704 (1993)] at an electron energy of 90 MeV. The angular distributions of the photons in the peaks of the parametric x-radiation have been measured up to fourth order for the first time. The results are compared with the kinematic theory of parametric x-radiation. © 1994 American Institute of Physics.