0018933 eae by the_device R-values convert them to fractions of the two nuclides in the fallout. table 3,5 lists results obtained in this way based on the averaged composition for the fallout. TABLE 3.5 DATA ON NUCLIDES IN FALLOUT Fraction Deposited R-Value(Average) ¢s!37 sr?° C5137 Mo?? sr?9 Koa 0.52 0. 44 0.96 0.65 0.47 Walnut 0.78 1,13 0.70 0.71 0,88 Oak 0.45 0,40 0.85 0.49 0.37 The sum of the nuclide fractions from the cloud and fallout should be one in each case provided that the R-values used are representative of the cloud and fallout as a whole. This seems to be likely for the fallout where the R-values change only relatively slightly with time in the cloud due to the scatter of the analytical results, but more doubtful Table 3.6 gives a comparison between the deposited and airborne fractions, The agreement is perhaps generally as good as could be expected considering the nature SAN BRUNO PRE of the data, All the samples from the land and reef shots show depletion of both Sr 90 and cs!37 as compared to the detonation yields, nounced in the earliest samples, This is most pro- Material coming down at times later than