| 单词 | plutonium 239 |
| 释义 | plutonium 239 (once / 1074483 pages) n WORD FAMILY plutonium 239 USAGE EXAMPLESThe uranium 238 then captures the neutron and is transformed into a new element, plutonium 239, which is also fuel. New York Times(Jun 23, 2010) 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 Hypo|Hyper weapon-grade plutonium, weapons plutonium plutonium 239 that is recovered when nuclear weapons are disassembled; it is stored in plutonium pits 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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