-ill-
included Ujelang Atoll.
Plankton from three stations between
the latter contaminated body of water and Eniwetok did not
exhibit the wi85 peaks.
The third area where plankton was
found to contain wi85 was east and southeast of Bikini Atoll
and included Rongelap Atoll.
The results of ion-exchange chemical separations for
all radioisotopes on four plankton samples,
two fish tissue
samples, and the gamma curve analyses for eight plankton
samples are shown (Table 1 and Fig. 3).
In Table 1, the dis-
integration rates of the plankton are given.
[In plankton
samples from stations 36 and 3, wi85 contributed 60 per cent
and 83 per cent respectively of the total radioactivity.
These samples did not contain u257 nor was it detected in any
plankton sample containing W 185 |
which wi85 was absent,
In the plankton samples in
the radioisotopes of the transition
elements Co, Fe, and Zn and the fission products Bal40_y,140
contributed almost all of the radioactivity.
The gamma spectrum analysis for wWl85 in those plankton
samples containing the isotope is shown at the bottom of Table
1.
The highest levels of wi85 were found in plankton samples
from stations 38 and 39.
In Table 1,
the disintegration rates per ml of plankton