Analysis of information sources in references of the Wikipedia article "Improvised nuclear device" in English language version.
Improvised nuclear devices—sometimes referred to as "crude nuclear weapons"—are simple, unsophisticated atomic bombs. They would probably utilize a gun-type device to create a critical mass and explosive yield. Although these weapons will probably not be based on complicated designs that use a combination of nuclear fission and fusion to boost the nuclear explosive yield of a weapon to extremely high levels, they could have an explosive yield of up to a few tens of kilotons. [...] If terrorists were to construct their own nuclear weapons, they would probably select a gun-type device. This type of weapon is easy to construct, and terrorists would probably not be attracted to more efficient ways of creating a critical mass to generate high yields.
