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plutonium 239

DEFINITIONS OF: plutonium 239

1

n 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

Types:
weapon-grade plutonium, weapons plutonium
plutonium 239 that is recovered when nuclear weapons are disassembled; it is stored in plutonium pits
Type of:
Pu, atomic number 94, plutonium
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
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