0018933
fallout,
On the reef shot it appears that the sampling planes were just
entering the base of the cloud at the 55,000 foot level since there is a
sudden jump in the R-values at this point,
The material collected at
lower altitudes is depleted in both Sr?9 ana cs)37 and is not greatly
different in composition from the fallout at 1000 feet, It is also noted
that the enrichment factors for both nuclides go through a maximum with
time for the samples from the light and variable stratum,
Several conjectures
might be offered in explanation of this unexpected behavior with time. One of
these is that some sampling may have been dons.at the lower boundary of the light a
wariable stratum where some of the particles collected had fallen below the stratu
where the rare gases were present. This could also be offered as a possible explanation for the late time rise in the, ge Lo Ire ratio in,the Oak_ shot,
Somewhat similar data for the Mo??-to-Kr
and Kr 8 to-Kr85 ratios
for the first four hours following detonation are given in Table 3,4,
Mo?9 to Kr88 ratios are also shown graphically in Figure 3,4,
The
At the.
lower altitudes the Mo?? is enriched and the Kr 88 depleted with respect
to Kr85,
1
!
3. 1,2
Fallout Data,
7
The radiochemical data on the fallout samples
may he used to obtain results for the distribution of Sr 0 and Cs!37 which
are complementary to those found from the cloud analyses.
The fraction
of the total Mo?? formed in the explosion which has left the cloud is found
by difference from the numbers given in Table 3,2.
Multiplication of
these figures by the sr?9 and Ce!3? R-values for the fallout and division