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VOLUME 95 (2012) | ISSUE 8 | PAGE 481
Quantum Effects for Parametric X-ray Radiation during Channeling: Theory and First Experimental Observation
The theory of x-ray radiation from relativistic channeled electrons at the Bragg angles - parametric x-radiation (PXR) during channeling (PXRC) - is developed while accounting for two quantum effects: the initial population of bound states of transverse motion and the transverse "form-factor" of channeled electrons. An experiment was conducted using a 255 MeV electron beam from a linac at the SAGA Light Source. We have identified a difference in the angular distributions of PXR and PXRC and obtained a fairly good agreement between the theoretical and experimental results.