Palen sama aDestocks delle RakDall a oe AE
Transuranics in Bikini Lagoon
oy oe
Lot
|
TT
+
T
boil
7
TT TTT
Jot y piv
0.1
tisiidt
1.0
TUT Ty
T
TT
10
1966[.
NUMBER
i972
Period of nuclear test
series at Bikini Atoll
pCi/g
2560
(0.9229)
36. 642.2
(0.023)
35.2
36.140.8
(0.0222)
39.14+0.6
(0.0239)
pur ©39py
19747
1976,
46.9
37.523.8
“241
1968 |
19700
46.5
TOTTI TOTO TT TTT TTT
TOT TT ty
4098
of 239 py and Plutonium Isotope Ratios in growth sections
1954-1956
BIKINI
42.7
CORAL
31.3
28.6
32.8
39.6
30,176.21
(9.0184)
36.2
3072
21.085.5_
(0.9128)5
28.7
3584
a eee ee ee pe ee ee eu es es
and, 395
100
735
2048
Estimated year of coral growth analyzed
Fig. 5.
1586
CHANNEL
4
3.69;
+ of coral growth.
392420
126447
tion analyzed.
cal separation from the coral (such as *°Fe)
and known to be present in atoll samples
(Welander 1969) were not determined.
The concentration of 7°°Pu and the plutonium isotope activity ratios in each annual
eee
1024
1296,
L.
emp
Concentration of **Pu and the plu-
tonium isotope activity ratios in each annual sec-
band,
decay-corrected
to year of
coral growth, are shownin Fig.5.
In surface water samples collected from
the north equatorial current or east of Bikini, the °*°+?40Pu concentration averaged
0.4 fCi liter? (Noshkin et al. 1974); the
average in 10 filtered lagoon samples
(ranging from 79-4 fCi liter?) was 40
(Noshkin et al. 1974), The Sr concentration in the lagoon averaged 570 fCi liter
compared to 71 in the surface waters oute
Fig. 4.
ow detection
‘3
TANNVHD YId SINNOD
Gamma-ray spectrum of the 1954-1955
growth section. Unidentified photopeaks are from
background and naturally occurring radionuclides.