RADIOACTIVITY ALONG THE 80TH MERIDIAN
.
GUAYAQUIL
10%
Poof
—_—
|
LIMA
!
,
_—
+
5; ACTIVITY, PC/SCM OF AIR
3
3
3
°
4
\
L
4
I
T
:
oe
py
SANTIAGO
M/
1073 -
.
a
{oNtot Magee
PUERTO MONTH
-.—_ —-+
10
|
CHACALTAYA
1072 |
10-4
SS
— .
1
104
+
Cal
+
107+ +
{
jo
0
+
1072|
487
PUNTA ARENAS
10-3 -
,
1957
1958
|
17
|
oe
r PN
|
|
1959
|
1960
1961
1962
Fig. 6——Concentrations of ?Sr in the air at selected sites in the southern hemis phere.
SOURCES OF AIRBORNE RADIOACTIVITY DURING 1962
The radiochemical analyses of bimonthly composited samples of
airborne fission products collected during 1962 have permitted a reasonable identification of the source of the debris in the ground-level
air at various sites along the 80th meridian, Therelative amounts of
*8sr, *y, “4ce, and “Sr have been employed to determine both an av-
erage shot date and the percentage contribution of the youngest component in the mixture, as described elsewhere.’? Assumptions were
made that all fresh debris in the northern hemisphere originated from
U.S.S.R. tests of 1961—1962 and that all in the southern hemisphere