O19 33
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Table 3.7
Fr
Mo?? FRACTIONS FROM COMBINED DATA
Time of Collection (hr)
Fraction of Mo?? in Cloud Calculated From:
Cloud
Fallout
sr®9
ggl37
90
_yIL_
cot
cgbE
45
6
0.019
0.013
0.049
0.26
0.57
1.10
723°
8
8
10
0.014
0,016
0.011
0.013
0.033
0.20
0.041 0.28
0.030
0.22
0.53
0.61
0.58
0.82
Walnut 1.6
L
0.20
0.28
0.45
0.90
1.6
0.46
3.4
rR
0.32
0.44
0.60
1.04
1.6
0.44
6.8
13
-
-
0.93
1k
0.19
2.1
4
0.19
0.21
0.26
0.43
0.30
0.78
2.1
6
0.17
0.20
0.29
0.51
-0.06
0.81
6
8
0.06
0.05
0.11
0.17
0.05
0.31
6
10
0.06
0,05
On
0.20
-0.03
0.30
Koa
1
Oak
12
0.013
0.010
le
0.86
0.76
In calculating the above values for fraction of Mo? in the cloud, the data rust
be picked from Tables Bl thru B6 with caree
Only cloud samples taken in the light
and variable layers are used and these are matched on an individual basis with height
line semples taken at a later time, wherever pcssible.
The half lives of the noble gas precursors of the nuclides used above ére: csl¥7,
3.8 min.; Sr®89, 3.2 min.; Sr%, 33 sec.; Y9, 10 sec.; Cols w1 sec.; Cst96none.
The fraction of Mo?? remaining in the cloud as calculated by each of these nuclides
increases inversely as the half life of the nuclides noble g2s precursor.
This indicat
that these nuclides and their precursors were not distributed in the same ratio throug)
out the cloud even at very early times.
If they were so distributed, the fraction of
85(a)