Fission Fragment
Fission Fragment : A nucleus resulting from nuclear fission carrying kinetic energy from that fission. Used only in contexts where the particles themselves have kinetic energy and thus could represent a hazard, irrespective of whether the particles are radioactive. Otherwise, the more usual term fission product is used. Fission Product: A radionuclide produced by nuclear fission. - Used in contexts where the radiation emitted by the radionuclide is the potential hazard