fissile material

fissile material

also called  Fissionable Material,  

      in nuclear physics, any species of atomic nucleus that can undergo the fission reaction. The principal fissile materials are uranium-235 (0.7 percent of naturally occurring uranium), plutonium-239, and uranium-233, the last two being artificially produced from the fertile materials uranium-238 and thorium-232, respectively. A fertile material, not itself capable of undergoing fission with low-energy neutrons, is one that decays into fissile material after neutron absorption within a reactor. Thorium-232 and uranium-238 are the only two naturally occurring fertile materials.

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Universalium. 2010.

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  • Fissile material —   Material that can be caused to undergo atomic fission when bombarded by neutrons. The most important fissionable materials are uranium 235, plutonium 239, and uranium 233.   U.S. Dept. of Energy, Energy Information Administration s Energy… …   Energy terms

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