Implosion weapon - definition of implosion weapon by The Free Dictionary
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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.
Dictionary of Military and Associated Terms. US Department of Defense 2005.
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.
The International Institute for Strategic Studies in London estimated that it would take a year for the heavy-water reactor to produce enough plutonium for a single "simple implosion weapon
" once it was up and running.
Also, implosion weapons
are more difficult to build than gun weapons, but they are also more efficient, requiring less fissile material.