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RADIOACTIVITY BACNGROUND IN THE OrsN SEA 455
LAGOONS OF THE PACIFIC PHovVING GROUNDS AnEG
2
by
DeCourcey Martin, Jr. and Nooert L. Wisner
=
The M, V. HORIZON 4s equipped with a smell radlochemical
3
iaboratory, radiation setection and assay equipment, and
ampling devices.
Assay of the radioactive contavination
in the Paecifie Froving Ground Area was dome in cenjgunetien
with the prelininary cceancgterhnic studics.
A study was meade of the redioaetivity of the waters in
ad
the
° oper ocean.
Samples of the Isgoonge and ccoan Ploor were
ah
.
n
oS
<<
obtained
with
a coring
davice
and wy
Gyedge,
aoa jn:
oo
ant oes
Piankte.
samples
»
were taken dn the oven ocean and phytopicrkton aad solloided
nathe
were filterec Crom lagoon waters.
isms
'
(
ee
.
Gther ravine orgtae
were osteined by trawling, Line fishing and szin-diving.
Several semples were teken of the air over the see surface.
2.1
ASSAY EQUIPHEIN:
my
fey cre
oe
yt tt
mat
pee
aos samples
were
meesvuved
Por
uf
~~,
ation.
Those samples
.
os
os
anglyzai
3
oe
7
my
ine
a
}
Séwy
to determine
i
eS
raed =]
WwW
cS
ann
a
eytoe,
sry
4
‘woth beta
end
ganne
vedi-
aa Le
Dba
nant}
mene
waish vere sulfieiesnily ageire
le
.
by weans
of7. gamma ray.
mom
ent
hated
the isctopes
Jeg
et
eRe
produsing
wn
oD ah Aned,
si
e654
AQCAVLLLGa $
fe
rf
EM:
An end-window Geiger-ltiller tube, wlth
met
fet
o
pt
the traviction
oe
Kos ow.
sa ay
Giffercnviah
pulse heignt
I. =
vare
snalysis.
veeremoanta|d
YI Sras SQ
Fe
OT
a mica win
The counting tube was shielded by tuo inches of lead to
reduce the background of cosmic and externel instrument
a
li
ep
13
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