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KNOX
model, The main cloud was assumed to contain 80% of F.; the base
surge, 20%. The parameters governing the activity—particle size dis-
tributions have been determined from the observed Sedan gross gamma
fallout pattern by mathematical experimentation. The values of these
parameters are as follows:
W,, (1) = w,(1) = 0.9
Wy (2) = w,(2) = 0.1
In r,,(1) = In r, (1) = 2.9
In r,,(2) = In r,(2) = 5.0
Om(1) =0,(1) = 0.69
On (2) =o,(2) = 0.59
Figure 6 shows the calculated and the observed gamma dose rate* at
H+ 1 hr from fission products vs. distance along the hot line for the
Sedan shot.
DIAGNOSTIC CALCULATION FOR DANNY BOY
The Danny Boy shot was a 0.42-kt nuclear cratering detonation
emplaced at a depth of 109 ft in dry basalt. The observed gamma fallout pattern for Danny Boy has been published.’ By mathematical experimentation with the cratering fallout model, the activity —particle
Size distribution parameters can be adjusted to duplicate the observed
Danny Boy fallout pattern, In this shot no visible main cloud was observed,! Thus, in the diagnostic calculation with the cratering fallout
model, it is assumed that 100% of the F. gamma activity is in the base
surge and that there is a preliminary valueof 0.05 for F.. The activity —
particle size distribution parameters determined in this calculation are
given below:
:
w, (1) = 0.9
w, (2) = 0.1
In r,(1) = 3.0
In r,(2) = 5.7
o,(1) = 0.69
o,(2) = 0.59
*The observed (H + 1)-hr gamma dose rate for fission products derived
from the observed total gamma dose rate at H + 24 hr, assumingthat 52% of the
(H + 24)-hr gammadose rate was from tungsten.!*