ABSTRACT
Soil samples from Rongelap Atoll were analyzed for radionuclide
content.
Using ion-exchange methods, a detailed study was made of
a soil sample collected in a bird nesting area at Kabelle Island in
July 1957.
Two radioisotopes, antimony-125 and europium-155, not
previously reported in samples from the Pacific Proving Ground were
found and their identity was verified by radiochemical precipitation
techniques.
The radionuclides contributing most of the radioactivity
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were Cel44_p,144 and Fe**, a non-fission product.
Other radio-
nuclides present in much smaller amounts included Rul06_ Rp 106,
gr?0_y99 csi3? Mn°?, Co®?, zr®>_Np??, Co?!