Implosion weapon - definition of implosion weapon by The Free Dictionary
Also found in: Encyclopedia
A weapon in which a quantity of fissionable material, less than a critical mass at ordinary pressure, has its volume suddenly reduced by compression (a step accomplished by using chemical explosives) so that it becomes supercritical, producing a nuclear explosion.
References in periodicals archive
Using less than 8 grams of plutonium, they obtained information useful in assessing how long a plutonium pit, or the core of an implosion weapon
, can be kept in a reliable state.
Also, implosion weapons
are more difficult to build than gun weapons, but they are also more efficient, requiring less fissile material.