ue 7k hours after detonation was 1,3 ¢/m per 104 fissions and that of was 2.7 d/m per 1C4 fissiors srile the gross fission product de~ cay followed the "inter=Pallou exponents and its activity at} hours was 13 d/m per 104 fissions (Refererce 6), This value of Np*3? activ~ ity foil gue from a calculated reutren capture-tc~fission ratio of 0.78 in the ue tanper. Using the hal®life of 2.33 cays for Npe39 and 1k for uelO and combining these cata with those for the total rate of decay of the fis~ sion products as ussuned above, a total activity curve was calculated, This is illustrated in Figure 3,1, It is seen that a decay rate expo- nent of 0,83 between H +h and H+ 23 hours; of 1.1 tetween H + 23 and H+ igv hours; and 1.6 from H + 5 to about H+ 14 days fits these portions of the curve, The presence cf the measured decay rates thus agreed with other parameters of the detonation during the exposure aud survey periods, Figure 3.1 was used in the dosage calculations, The effect on dosage of the energy spectrum resulting from this composition a Zat : rahe’ oa” is discussed in Chapter h, A fe eee eet Pactnne wee yell ab et oe