The initial-gasmm-exposure-rate Gata presented are subject to umcertainty
in abeclute magnitude.
Data reduction indicated a strong possibility that
the wiring ef the ungnetic-tape recorders might not have been the seme a8
previously presumed and that the association of e particular recorféer channel
with a perticular detector sensitivity renge might have been incorrect.
The
wiring could not be checked in the laboratory because the equipment had been
@isassembled at the termination ef the field phase of the operation.
Bub-
sequent enalysis ef the recorded pulse shapes has led to the association
assumed for the initial-~gamen date presented herein, and the derived totelexposure values agree reasonably well with those measured by Redwing Project
2.1 (Reference 9).
However, there is stil) some uncertainty on this point,
and the curves presented may be eff in absolute magnitule, although the-ghaye
of the curves as a function of time is probably correct.
The initial-gaman values given represent those observed at the
detector and ahould be mitinlied by a factor of approximately 1.2 to correct
for station shielding.
This factor cof 1.2 is a measured value of the
attemation ef the blast shield for Co™ radiation; the attenuation is a
function ef the energy of the incident radiation.
Time is a factor only
in that after one minute there is little geume radiation in this energy range
(> 1 Mev). Figures 3.23 through 3.260 should be miltiplied by 1.2 to give
free-field values.
sir. bovis’. 1c
The data in Figures 3.26 is in reasonable agreement with similar date in
Reference 9, especially after the dsta of Figure 3.26 has been extrapolated to
@ tine equivalent to that reported by Redwing Project 2.1.