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An atomic bomb is any bomb which obtains its destructive energy from the excess binding energy of atomic nuclei. The term is most commonly applied to bombs that release the excess binding energy of heavy atoms by fissioning them to form lighter atoms, but can equally correctly be applied to bombs that release the excess binding energy of light atoms by fusing them to form heavier atoms (however such bombs are most commonly called hydrogen bombs).

The fine details of this are somewhat blurred as most modern nuclear weapons use some combination of both fission and fusion, regardless of what they are called (e.g. dial-a-yield tritium gas fusion boosted atomic bombs, conventionally built hydrogen fusion bombs usually get more than 90% of their yield from fast fission of their depleted uranium tamper) to optimize their characteristics.

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9y ago

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