J
J
1
4
Tungsten Data
“Durtag the U.S. summer tests
Tungsten-i85 was produced.
In the Pacific,
This nuclide has a half-life of
74 days and furnishes a tracer for this particular
The available analyses of pot samples are
sertes.
test
included
In Table 3.
ll
4
a
o
a
y
cu
al
i
n
i
LE
i
In order to compere total Tungsten-185 fallout eat
various
times, the activity hes been extrapolated back to
an arbitrary date,
June 1, 1958,
This also allows eddition
of results for severe months on a sound basis.
trapoleted vaives, grouped by
These ex-
latitude band for the months
avatlable, are shown In Table 9.
For the months
(September, October, November) when
all bands have data, fhe totals
fallout
Indicate low Tungsten=185
In the equatorial and the I10-30°S bands, about
one-fourth
to one-third of
bands.
found
tn
the other
three
7
In additton,
Tungsten-185 fallout
the five months.
artiftictal
that
the data
Indicate the extrapolated
fo be approximately equal for each of
This is perhaps surprising and may be an
indication caused by
the grouping.
The total Tunagsten-185 deposition, extrapolated to
june 1, 1958, may be estimated as 18 megacuries between SO°N
and 50°S,
By January |, 1959, this would have decayed to
about 2.5 megacurles,