plutonium 239


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Related to plutonium 239: Plutonium 240, Plutonium 238
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Noun1.plutonium 239 - a highly fissionable isotope of plutonium that is used in atomic weapons and as a reactor fuel; produced by irradiating uranium 238 with slow electrons
atomic number 94, plutonium, Pu - a solid silvery grey radioactive transuranic element whose atoms can be split when bombarded with neutrons; found in minute quantities in uranium ores but is usually synthesized in nuclear reactors; 13 isotopes are known with the most important being plutonium 239
weapon-grade plutonium, weapons plutonium - plutonium 239 that is recovered when nuclear weapons are disassembled; it is stored in plutonium pits
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For example the half life - a measure of the rate of natural decay of radioactive materials - of the waste product Plutonium 239 is 24,000 years, and that of Neptunium 237 is two million years.
For example the half life -- a measure of the rate of natural decay of radioactive materials -- of the waste product Plutonium 239 is 24,000 years, and that of Neptunium 237 is two million years.
Plutonium 239 is in fact a waste product of conventional uranium power plants.