Qs Let Dy, = 0.05 rep/br t, = 26d . 1.2 t, 2 0.154 then DE 2 0.05 (a8) and . “0.2, “0.2 Ds Sg, ty1.2 (tty) 2 25 rep/hr (beta) = 5(25) (0.098) (24) (0.96) =280 rep. If a comparable deposit had occurred on shot 2 where the level of contamination was higher, one might estimate a dose of280 (13.4) s 3800 rep for a similar body area. | From the ground itself one oan make a similar guess; here one uses the shot 9 figure of 20 mr gamma at 3.5 hr after burst as a beginning. Estimates of the ratio of ionization from beta radiation to that of gamma in fall-out fields range from about 20 to 14031, at the contaminated surface (ref.9). Using the sane time interval and a dose rate initially of Dy (0.020) 20 = 0.40 rep/hr beta, then D =280 (0.40)/2.5 = 4.5 rep beta While if the ratio was 140:1, De, =z 85 (0.020) 140 = 2.8 rep/hr beta and D #280 x (2.8)/2.5 = 32 rep beta for shot 9, with a comparable exposure after shot 2 of Da» 60 ~ 430 rep bata. Such doses probably would be only to areas around the mouth, and would of course be in the superficial tissues of the skin. Some figures for the 131 octivities in sheep thyroid samples counted in this Laboratory (10) and the corresponding dose estimates made on the basis of parts A to H will be finally listed. They are lower in all cases than the doses calculated in parts A to H, ae DO’ ARCHIVE: 4 2} Py nee