be readily extracted from the sources cited. Induced product contributions may be added in after diminishing the tabular values (product/fission = 1) by the proper ratio. After the resultant computed doghouse-counter decay rate is compared with experiment, the ionization rate (Sc) may be computed for the same composition. Beta activities may also be computed for this composition—— making allowance for those disintegrations that produce no beta particles. The Navajo composition was computedin this manner, as were the rest of the compositions, once fractionation corrections had been made. Shot Zuni. A number of empirical corrections were made to the computations for un- fractionated fission products in an effort to explain the decay characteristics of the residual radiations from this shot. The lagoon-area composition was developed first, averaging available lagoon area R-values. As shown in Figure 3.32, R-values of nuclides which, in part at least, are decay products of antimony are plotted against the half life of the antimony precursor, usingthe fission-product decay chains tabulated in Reference 56. \. a (Somejustification for the - If the assumptions are made that, after ~45 minutes, the R-values of all members of a avalchain are identical, and related to the half life of the antimony precursor, then Figure 3.32 may be ased to estimate R-values of other chains containing antimony precursors with different half lives. The R-value so obtained for each chain is then used as a correction factor on the activity (Reference 41) of each nuclide in that chain, or more directly, on the computed doghouse activity or ionization (SC) contribution (Table 3.21). The partial decay products of two other fractlonating precursors, xenon and krypton, are also shown in Figure 3.32, and are similarly employed. These deficiencies led to corrections in some 22 chains, embracing 54 nuclides that contributed to the activities under consideration at some time during the period of interest. The R-value of I'*! was taken as 0.03; a locally measured but otherwise unreported [!°¥1'*! ratio of 5.4 yields an I'*? R-value of 0.16. Although the particulate cloud composition might have been developed similarly, using a different set of curves based on cloud R-values, it was noticed that a fair relation existed be- tween cloud and lagoon nuclide R-values as shown in Figure 3.33. Here R(x) cloud/R®*(x) lagoon ts plotted versus R°*(x) lagoon average. The previously determined lagoon chain R-values were then Simply muitiplied by the indicated ratio to obtain the corresponding cloud R-values. The lines indicate the trends for two other locations, YAG 39 and YAG 40, although these were Rot pursued because of time limitations. It is assumed that the cloud and lagoon compositions ee extremes, with all others intermediate. No beta activities were computed for this Shot Tewa. Two simplifying approximations were made. First, the cloud and outer staaverage R-values were judged sufficiently close to 1 to permit use of unfractionated fission Products. Second, because the lagoon-area fission-product composition for Shot Tewa appeared to be the same as for its Zuni counterpart except in mass 140, the Zuni and Tewa lagoon fission Products were therefore judged to be identical, except that the Ba’”-La™® contribution was in- Steased by a factor of 3 for thelatter. > The induced products were added in, using product/fission ratios appropriate to the location Nherever possible; however, the sparsity of ratio data for fallout samples dictated the use of om values for most of the minor inducedactivities. bw wae “ 3.4.6 Results and Discussion. Table B.22 is a compilation of the computed doghouse count- Tates for the compositions described; these data and some observed decay rates are shown meres 3.34 through 3.37. All experimental doghouse-counter data is listed in Table B.23. are . B.24 Similarly summarizes the Flathead and Navajo computed beta-counting rates; they B25 Ompared with experiment in Figure 3.38, and the experimental data are given in Table tion t Results of the gamma-ionization or dose rate (SC) calculations for a surface concentra5 104 fissions/ft? are presented in Table 3.22 and plotted in Figure 3.39. It should be em- ized that these computed results are intended to be absolute for a specified composition 59