RESULTS AND DISCUSSION OF RADIONUCLIDE ANALYSIS
Fission product separations (see UWFL-33 for techniques) >
and gamma spectrometric determinations were made on plankton
samples collected during the Walton and the Marsh surveys.
Plankton samples collected from the Walton in June 1956 were
analyzed chemically June 30 and August 29 of the same year.
Similar samples collected from the Marsh in 1956 were analyzed
both for fission products and certain radioactive non-fission
product isotopes during the last week of December 1956 and the
first week of January 1957.
In addition to the chemical] analyses, gamma spectrum
curves were made on two Walton plankton samrles, one of vhion
was collected just north of Bikini Atoll (station 9D), and the
other in the open sea (8C) about 65 miles northwest of Bikini
Atoll.
In general,
the cbserved percentages of total beta activi-
ty contributed by the various fission products, corresponded approximately to those expected on the basis of the Hunter and
Ballou curves >?
DOE ARCHIVES
Of the Walton samples,
chemicsl analyses were made on
plankton from nine stations: 1E, 3A, 4D, 7D, 8A, 9A, 9C, 9D and
1UB (Table 5).
Variation in isotope percentages is great be-
tween samples and no definite pattern of variation is evident
between the different collecting areas.
If the éverages of all
samples are compared with the expected percentages
(based on an
avernge 30-day interval following detonation), the results are
a3 follows:
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