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.
were Ce
The radionuclides contributing most of the radioactivity
1445144 ong Fed ,
a non-fission product.
Other radio-
nuclides present in much smaller amounts included Ru106_py106,
90
90
Sr'"-Y'-, Cs
137
54
» Mn’, Co
60
-, Zr
95
“-Nb
95
, Co
57