~ Computaticn of Ny was made for Shot 5 at 0+ 9 ceys 4/ Consideration wasmade of the contribution from fission products as well as that from u23? and U237 induced activities. Since the capture to fission ratio for Shot 1 and Shot 5 were nearly the same these data were assumed reason- ably valid for Shot 1 calculations. fs Similarly the beta particle to gamma photon ratio calculated for Shot 5 at 0 + 9 days was used in this eveluation.4/ Therefore, y, t 2 (2 %103)(1.5 x 1023}(4,03 x 1073)(1074) x t F.2 0.45 1.47 x 1022 photons/sec at C + 9 days. RELATION OF DEPOSITED ACTIVITY TO GAMMA FIELD AT 3 FT FOR AN INFINITE CONTAMINATED PLANE Let I, = radiation iniensity in r/hr at time (t) 3 ft above an infinite contaminated smooth plane a constant rhich includes the air absorption ccefficient deposited activity in pe/sq cm et time (t) averare parma source energy in Mev/disintegration at time (t) KEE, e dose build un factor6/or the ratio of the cose from all photons to that from unscattered photons source energy degradation cused by roughness of the plane=~— (KALE,(E)(R), radiation intensity at time (t) in r/hr at 3 ft as measured in the field 144 ¥ ee