UNITED STATES ATOMIC ENERGY COMMISSION NYO-637 GAMMA-TRANSMISSION IN IRON, TUNGSTEN, LEAD, URANIUM, AND A PURE COMPTON SCATTERED BY ROOT-MEAN-SQUARE ANGLE CALCULATION By

m n^ '* » The root-mean-square angle technique reported earlier (NTO-635) % is extended to the calculation of buildup factors in iron, tungsten, t lead, and uranium for 1,..., 8 Mev photons and a pure Compton acat-I terer for 1, 2.5, and 10 mc2 photons. Computations are carried out to 20 mean free paths for the metals and kO mean free paths for the Compton scatterer. The behavior of the buildup factors as functions of the initial energy for the heavy elements is found to differ qualitatively from that for iron and the pure Compton scatterer. PHYSICS Beproduced direct from copy as submitted to this office. Work performed unde