196
FOOTE
resultant fallout amounts of each material as a function of date are
given in Table 1, where the amounts arein millicuries per square mile.
Table 1— PERIODIC FALLOUT LEVELS, I, IN MILLICURIES PER SQUARE MILE
DETERMINED BY USING AN 11 BY 11 MATRIX EXCEPT AS NOTED
Tos, + oy
(r=
lyon? Tyo
(7 =
12.8 days)
liste,
(7 =
30 years)
Tid og bimap,
(T=
285 days)
314 days)
2.0 years)
Dec. 22, 1962
590
325
152*
1500
61
344
June 30, 1963
855
0
182*
2380
Jan. 1, 1964
168
0
280
2030
89
106
33
0
375
1750
97
150
Date
65 days)
June 30, 1964
lenin
(T=
Tras,
(T=
*Determined by use of a 10 by 10 matrix.
Recent measurement of the rainfall atmospheric washout near
Hattiesburg, Miss., shows fission debris from the Nov. 16, 1964, test
by Communist China. About 157 mc/sq mile of “°Ba—'°La and 30 mc/
sq mile of *Zr—*°Nb washed out in the rains of Oct. 27 and 28, 1964.
Also, there is an indication of dry fallout of “°Ba—'°La prior to
October 27 as seen in Fig. 20.
(NFALLT
0.50
Fa
i
+
+
.
a
ee
ze
SQ MILE
~.
=
0.40 +
oo
eo
Ses
0.35
o
1401o/ kK MATRIX OUTPUT
&
0.55
-
0.15
0.10
:
NESE ATMOSPHERIC
= TEST
0.05
-0.05
12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31:1
OCTOBER
1964
Fig. 20—Indication of !Ba~1'La fallout.
23 45
NOVEMBER
6
7