-21-
Kabelle Island, Rongelap Atoll, on July 18, 1957.
2.
The presence of two radioisotopes not previously reported in
samples from the Eniwetok Proving Ground was demonstrated.
These
isotopes were antimony~-125 and europium-155; they contributed respectively 3.74 per cent and 1.41 per cent to the total radioactivity.
3.
Of the total radioactivity, 41.7 per cent was due to Cel44_p,144
and 40.6 per cent to Fe55, a non-fission product.
4.
Other radioisotopes present in much smaller amounts included
Rul06.ppl08 5,90_y90
,
cei3?
54 C08,
60 zr®5.
, Mn°*,
np95, and C097,