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CHAPTER 3
3ESULTS AW DIscussioL
3.1 BESIDUAL RADIATION MEASUHEIRETS
The data obtained from the residual radiation stations are shom
in Pigures $.1 through 3.15 in the form of log-log plots for convenience
of presentation and for ease of determination of the decay exponent.
The decay exponent is equal to the slope of a straight line draw
through the data points that are considered to be related to each other
only by radioactive decay.
All residual data was analysed in detail
for this report; the instruments for those stetions represented by
Pigures 3.3, 3-11, and 3.12 were cperating at levels below their highresolution region ené €14@ not yield the essentially continuous curves -¢
show in the remainder of the group of Figures 3.1 through 3.16.
On Figures 3.1 through 3.18 the slopes are show as dashed lines which
were draw through the linear portion of the curves.
In draving these
dashed lines, early times were avoided when the concentration of ganmmaray sources was still building up because of continuing deposition of
fallout material, and other data points vere ignored in cases were rain
or wing hed redistributed the fallout material and caused perturbations
in the decay curve.
ST, b5u.) 2c
Measured residual game rediation doses for each of the four shots
are plotted on maps of Bikini Atoll in Figures 3.19 through 3.22.
Pree-field
exposures show on these figures were extrapolated to infinite time using
Bquation 1.2, Section 1.3.2, of this report.