416
SALTER
Table 3—-STRONTIUM-930 CONCENTRATIONS AT 34°S IN
1962 AND 1963
Altitude,
1000 ft
Sr concentration, dis/min per 16° scf
~
Total
1961
U.S.S.R.
Maximum from
55-Mt test
Starfish
February—July 1962
50
60
70
80
90
105
10— 30
60—110
60— 80
40—90
30—40
10— 20
~]
~]
*
*
*
?
*
*
*
*
*
*
September 1962
63
78
90
100
110
55
20
20
<10
*
*
?
*
*
*
*
*
December 1962
63
78
130
80
20
<10
~2
<2
*
*
105
100
30
~2
20
~1
<3
<2
*
20
30
<2
10
*
<1
10
30
30
~]
~1
<1
20
20
2
20
89
25
*
<3
*
April 1963
77
91
104
75
120
130
~2
10
40
May 1963
66
104
115
130
30
80
June 1963
67
17
86
130
620
600
30
450
500
October 1963
68
80
380
370
250
250
*Negligible.
sible to assign a considerable fraction of the ?°Sr attributedhere to the
1961 series to these later tests; and, if it was 32, all of it.
It is of interest to estimate what the major source of the debris
that was assigned to the 1961 tests might have been. The detonations
which reached into the lower stratosphere listed in the first line of
Table 1 may account for the 1961 debris below 70,000 ft at 34°S, but
they are unlikely to be the source of material observed at the higher