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