The measurements, including two points calculated by integrating gamma-rate records
from Shot 4, are presented in Figure 3.1. Prediction curves (from Reference 7) and
measurements during Greenhouse and Ivy (References 8 and 9) are aiso presented for
comparison.
One recordof initial-gammma rate versus time up to shock-arrival time (0.9 seconds)
was recovered after Shot 1. Two complete records (illustrated in Figure 3.2) were recovered after Shot 4. The shock-arrival times interpolated from Project 1.1 data are
107,
=
+
OE
106
r
Shot 2 - 1iMT
Snot 3-O.13 MT
Shot 4 - 7.0 MT
Shot 6 - 1.7 MT
Ivy Mike (Malik) -i10.5 MT
Previous Measurements
TM 23-200 Predictions
Roentgens
104
Greenhouse
0.25 MT
103
Greenhouse
0.08 MT
10!
Range , 102 Yords
Figure 3.1 Initial gamma exposure versus distance.
indicated on the figures. Apparently, this time is associated with the break in the slope
of the gamma-rate curve. The integration of these curves indicates that the exposure
at the 7,171-foot station was 1,000 r before shock arrival and 16,800 r after arrival.
The corresponding exposures at the 13,501-foot station were 14 r and109 r. Therefore,
42