EVENT AND DESCRIPTION OF EXPOSED GROUPS 1] Depth Dose in Phantom Man —~—*— initial Radiation --X--- Residual Field oO PERCENT OF 3.0 CM DOSE nN ~ oO Oo 2 oO Oo | Tosca pease are ey “y 500 O18Meww mm ne ne ene nn eee ee en ae eT 1000 20+ 105 0 l 20 DEPTH IN (CM) i ! 30 Figure 1.5—Compurison of depth dose curves in a masonite phantom man, of the initial atomic bomb gamma radiation and of gamma radiation from a planar field of fission products deposited on sotl after an experimental nuclear detonation, C4 C3 Cc the atolls, and spectrometric and radiochemical data. The actual duration of the radioactive fallouts was not known, and the values for length of exposure were subject to uncertainties in the times at which the fallouts began. A range of possible whole body gamma doses was calculated, and the values considered to be most probable are presented. Diffuse geometry from the semi-infinite planar source was believed to increase the biological effect of the whole body dose expressed as an air dose, compared in the geometry of the usua] X-ray exposure. Soft gamma and beta radiation from fallout on the ground and especially on the skin itself resulted in a superficial dose which was high enough to produce lesions. No quan-