- 61 coconuts and less than 4 percent in pandanus, squash and papaya fruit. Val- ues for rare earths given in USNRDL-454 agree closely, with the exception of papaya for which their value is higher by a factor of ten. Non-fission-product radionuclides. Radionuclides of Sr, Cs, Ce and their daughters did not account for the total activity in most samples analy- zed Complete fission product analyses of samples collected at Eniwetok and Bikini Atolis indicate that non-fission-product radionuclides may account for more than half of the total activity in some fish; Zn 65 contributes one- fourth or more of the total activity in shark muscle as determined by radiochemical analysis and confirmed by following the decay