dee tk of an 1? atom trom intestinal tract to thyroid is 2.4 hrs. To allow for both the above cireumstances, one mush use two exponentials in the expression for A,(t) given in ref. (3) and sultaply Aj(t) by 4 in equation 2, Again using equation 3 with these modifications, (with A(r + b) = Ay # A, here and not 2n,) E = 0.7 lev . K, 0 365 ty « O.15d K = 0,058 4° 0.216 Ky m 0.0416 ho * 6693 1 A, * 060855 as before to m 270 For Shot 9: De 3y(106}0.058L-04216(0415) 2(0.216)(0.302)(e 186)(0.0 + epee fe #0 - 0) ~6693(0.15) - -0 +0) = 280 - 2 = rep For Shot 2: D = 13.4(260) = 3700 These latter dosages all occur within short tines, of the order of a week or leas, ard leave no ed idence in the form of lingering activity. We can only estimate them on the basis of the relative amounts of the various isotopes in the fission products present at any time. Again, an error of 113 may also be present due to lingering Shot 2 ysl activity in the samples, -12- as no® ARCHIVES