e/Pit (nuclear weapon)

Information
has gloss	eng: The pit is the core of an implosion weapon – the fissile material and any neutron reflector or tamper bonded to it. Some weapons tested during the 1950s used pits made with U-235 alone, or in composite with plutonium, but all-plutonium pits are the smallest in diameter and have been the standard since the early 1960s.
lexicalization	eng: pit
instance of	(noun) 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 Pu, atomic number 94, plutonium

Media
media:img	Partially-reflected-plutonium-sphere.jpeg
media:img	PuMold.jpg
media:img	Steel balls png.png
media:img	Swan One Point Test.png