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Nuclear weapons
Intermediate
Uncontrolled chain reaction or fusion.
Fission bombs achieve supercritical mass quickly; thermonuclear weapons use fission to ignite fusion. Energy released in microseconds.
Hiroshima: 15 kt.
Arms control and non-proliferation treaties exist.
In more detail
Nuclear weapons use rapid, uncontrolled fission or fusion to release enormous energy. Their development and control are major international concerns.
Real-world uses
- Nuclear deterrence is a central topic in security policy.
- Nuclear treaties aim to limit weapons and prevent proliferation.
- International agreements aim to limit nuclear weapons, which rely on very fast uncontrolled chain reactions.
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Frequently asked questions
What is the difference between fission and fusion weapons?
Fission weapons split heavy nuclei, while fusion weapons join light nuclei and are usually triggered by a fission device.
Why is this topic sensitive?
Because of its potential for mass destruction, it is regulated internationally.
How does a weapon differ from a reactor?
A weapon releases its energy in a fraction of a second, while a reactor controls the chain reaction to produce steady power.
Related topics in Atomic & Nuclear Physics
Nuclear fission · Chain reaction · Nuclear reactors · Nuclear fusion · Fusion in stars · Fusion reactors