~
Computaticn of Ny was made for Shot 5 at 0+ 9 ceys 4/ Consideration
wasmade of the contribution from fission products as well as that from
u23? and U237 induced activities. Since the capture to fission ratio
for Shot 1 and Shot 5 were nearly the same these data were assumed reason-
ably valid for Shot 1 calculations.
fs
Similarly the beta particle to
gamma photon ratio calculated for Shot 5 at 0 + 9 days was used in this
eveluation.4/
Therefore,
y,
t
2 (2 %103)(1.5 x 1023}(4,03 x 1073)(1074)
x
t
F.2
0.45
1.47 x 1022 photons/sec at C + 9 days.
RELATION OF DEPOSITED ACTIVITY TO GAMMA FIELD AT 3 FT FOR AN
INFINITE CONTAMINATED PLANE
Let I, =
radiation iniensity in r/hr at time (t) 3 ft above an
infinite contaminated smooth plane
a constant rhich includes the air absorption ccefficient
deposited activity in pe/sq cm et time (t)
averare parma source energy in Mev/disintegration at
time (t)
KEE, e
dose build un factor6/or the ratio of the cose from all
photons to that from unscattered photons
source energy degradation cused by roughness of the
plane=~—
(KALE,(E)(R),
radiation intensity at time (t) in r/hr at 3 ft as
measured in the field
144
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