Engelsk substantiv: plutonium 239 | |||
1. | plutonium 239 (om masse eller substans) 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 | ||
Mindre spesifikke uttrykk | atomic number 94, plutonium, Pu | ||
Mere spesifikke uttrykk | weapon-grade plutonium, weapons plutonium | ||