-
~
were
Loan
:
wheter lt
.
-
.
-
Ce A ee ae
Ce a a
a
-
coe
ane ee
-
~
-
wee a a RE sy Ee ee lip
we
-
eee. poy pn pelle
awe
—
4,
moe
ae
-
a
-
ee Sp em -
ites
-
lived ®°co and 1°5Sb relative to 137Cs to the exposure rates
in these areas will also cause the radiation levels to
aa
decrease more rapidly with time.
|
.
“Rt
°
.
|
|
aA,
High resolution Ge(Li) spectrometry of soil samples ~~
allowed us to make detailed identification of the radionuclides present at various sites around the atoll.
The
3
: "eR: 60ORE 4
F
-
:
spectra of Bikini Island soils extibit very prominent 177¢Cs
eae.
and ®°co peaks, while peaks due to **5Sb and rhodium
eo ..
r
isotopes are barely discernable above the background.
Trace
i.
amounts of other isotopes such as +558u, ?5?Eu and 4#*!An
pon
a
-
are also evident.
et
|
,
wm
_
,
as
c-
Wo
The Ge(Li) spectrum for a soil sample from Lomilik
bt
Island, a near ground zero blast area approximately in the
center of the Aomen-croij Complex,
is shown in Fig.
3.
roy
exposure rate at this site was several hundred ur/hr,
The
due
eae
primarily to ®°Co (75%), with *+*5Sb, 1°?™Rh, and 337Cs
Log
{i
t
accounting roughly equally for the remainder.
The prominent |.
"yt a .
.
,
“
aS
:
e.
®°Co peaks are evident in Fig. 3, as are all the gamma-ray
“Lines of 1%8sb and the recently identified (4) long lived
S005 148
.osn
fe
|
:
>
ET
wee
ee ee Pe
oe
a
SeSe
:
erst
nN
wee alRe eee eee ee ey te |
-e-F
ae
=
—~:
.~
=
esd
we
i
a