According to E. York,
ditional
ic is pessible chat most of the ad-
energy is concentrated in relatively iow-energy gamma rays.
Because
the experiments wentioned above are not completely analyzed,? the point wil!
be pursued no further dDeyood menrisning that there is a possibility that the
discrepancy between the model of this report and the experiment can be explained
when analysis is complete.
h.2 INSTRUMENTATION
&.2.1 Design Criteria
The gamma dose is caused by both fission-product decay and neutron captire
by nitrogen in ee atmosphere.
At sowe stations the fission-product cootribu-
tion was expected to predominate after several seconds.
Extrapolating this
.
fission-product contribution backward in time and subtracting it from the oar
,
would then give the dose arising from capcure of neutrons by nitrogen.
a
“a site)
» oa Js
In order to follow the garma-dose rate for a time sufficient to accagplish
this, a detector capable of covering several orders of aagnitude was required.
&.2.2
Instrument Description and Calibration
The garma-dose-rate-versus-tize instm=ment for the four lower Teak stations
and Orange Station 72 consisted of an BCA 6199 photomultiplier rube with a
-
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