most of Micronesia.
It is presently
being saazseli out with
formation of soveral sovereign states
are also
within this region
the
Data
included fer some of the central and southern Marshall
Islands which were reached by U.
S.
Department of Energy
fieid
trips ships.
Field measurements of external radiation were conducted with
a pressurized ion chamber environmental radiation monitor,
Dy im situ gamma spectrometry with
most
of
the measuren
©
scintillation detectors.
(5 cm X 53 cm)
and
sodium iodide
Soil samples were also collected at
nt sites.
These were later analyzed in
the laboratory for gamma emitters by high resolution gamma
spectrometry; and for ?°Sr/?°y, and in some cases 73%, **%*pu
by radiochemical separation and counting.
Data on strontiui
and transuranics are not included in this
report.
The primary purpose of the in situ gamma spectral measurements
§
was to provide a data base for energy depen d
for the
stainless
steel-walled ion chamber detector.
As
result the measurements were made at low resolution
pectra into the ion chamber
t for energy dependence in
4
ao
or
oO
response characteristic to
the environmental
(100 keY
2.5 MeV. A programmable calculator
uv
was used to fold the
to
a
from 0
w
a
Fe
u
per channel)
a
radiation monitor.
Correction
factors vere
typically about +5%.
a
+2
aw
g
3
M
=
ce
rn
-
nm
QO
ct
Q
fi.
'
renresont t
C,
Q
rt
report
QQ
“4
4
this
9
rate data presented in
net
Tae average exposure
oO
exposur2 rate a fow times per second.
Q
rate digitailiv in wR/hr based on samoiin
wy
The ion chamber instrument presented the instantaneous exposure