Wen
0021620
Many of the K/q values given in Table 14 were derived values that
were obtained by means of a set of correlations to increase the amount
of data for evaluating and selecting the functional dependence of K/ q
on X.
However, for the determination of the final estimate of the equa-
tion coefficient and its dependence on the yield, W, it appeared that
the most reliable method would be to select only those values of M,(1)
and K/q that were obtained from direct measurements. These include the
JANGLE "S" and "U" Shot data as given in Table 15; the remainder are
summarized in Table 16.
The data from PLUMBBOB Diablo and Shasta can-
not be used to determine the yield dependence of K/q because a is unknown. -The one point from CASTLE Koon (Station Fox) was ‘not used; its
value of Kx!/2/q is 7.3 x 10°9 which is about a factor of 17 to 40 times
larger than those given in Teble 16.
The values from Teble 16 of KXx!/2/q for the surface land shots and
K/q for the surface water shots are plotted against yield in Fig. ll.
The average values of KXl/2/q, for Shots Diablo and Shasta and the K/q
values (average for Romeo) are oy5e plotted for comparison. Since the
indicated rapid increase in KxL 2/q with yield for Shots Zuni, Tewa an
Bravo, seemed to be extremely unlikely, a geometric mean value of KX1/2/q
for the three shots was taken.
There is some justification for decreas-
ing the value for the Bravo Shot in that the r/hr at 1 br values given
in reference 5 are probably low because the decay curve used to correct
the observed intensities back to H + 1 appear to be too flat between
1 and 4 days after burst (compared with those of Reference 12 and the
estimated rp) values given in this report). Also, the M,(1) values for
Zuni and Tewa are probably somewhat low due to difficulties in sample
recovery and inconsistencies in the Ca and other analyses (described in
Reference 13). Whether these two combined causes could account for the
factor of 5 difference shown is not known. Although the two values of
KX1/2/q for the JANGLE shots may be high because of extraneous inert
desert sand, there appears to be a method of treatment or data available at present by which the amount of this
excess weight can be esti-
mated. There is no reason to assume that KX1/2/q would have a minimum
between 10 and 1000 KT.
DoENV
Substitution of the appropriate values of q in the two geometric
values of KX1/2/q, solving for the constants of an assumed scaling
function of the form a,W", and replacing X with Eq. 26 gives
K(x,W) = 2.19 x 10729 wO-223/2 yo atoi2 Kr
62
(35a)
66