Detection of Coherent Bremsstrahlung from Crystals

When fast electrons pass through a crystal it is expected that the bremsstrahlung will be enhanced and linearly polarized if the electrons travel in a direction nearly parallel to some densely occupied rows of atoms. Using a small germanium crystal, the expected enhancement was found. The crystal was mounted in the Cornell synchrotron in such a way that the 1-Bev electrons would cut across one of its edtes, approximately in the direction on which there is a nucleus every 4.0 A. (W.D.M.)