NEW METHOD FOR PRODUCING AND ANALYZING LINEARLY POLARIZED GAMMA-RAY BEAMS
1962
The new method for the production and analysis of a polarized beam of high-energy gamma rays is based on observable interference effects in high-energy electron pair production on crystals. Due to these effects the absorption rate of very high-energy photon in crystal line matter depends on their linear polarization. Epuations are derived for the computation of the polarization and intensity loss. plot is presented of the intensity loss as a function of the imum value E. Values of E at different energies for the optimum value of the angle alpha at that energy are tabulated for copper and silicon crystals. Plots are also given of E as a function of alpha in copper for the photon energy, omega , equal to 6 Bev, and of E as a function of omega at alpha = 3.7 m rad. finally, the method by which the device can be used as a polarimeter is described. (H.D.R.)
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