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0018933
APPENDIX E
Derivation of Formula for Percent Mo Left in Cloud
The formula given in Chapter 3 for the percent Mo?? left in the cloud
is based on a materia] bzlance for some nuclide, Y,.
It can be derived as
follows:
t
Let Y, = atoms Y formed in the explosion
e
Yo so"
Yro
?
"
Mop, ©
"
left in cloud
"in fallout
atoms Mo?? formed in, the explosion
Mo, =
"
"
left in the cloud
Mono *
at
"
in the fallout
y *
k
fraction of Mo?? atoms left in cloud
3
the ratio atoms Y: atoms Mo?? formed in thermal
neutren fission, a constant
[R9%y)] = R-value for nuclide Y in explosion
[R9%y)] cz"
| [R9% x] Fo = unt
%e =Y¥o+ Yeo
=
o
"
"
non cloud
"
at
mM! fallout
-
eovececd
1
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