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Focusing exclusively on the insane power locked in the atom's core—the nucleus. This is the domain of fission (splitting heavy nuclei), fusion (merging light nuclei), and radioactive decay. It's about liberating the binding energy that holds protons and neutrons together, yielding millions of times more energy per reaction than chemistry. Advanced concepts include catalyzed fusion (using muons or antimatter), betavoltaics (power from decay electrons), and photodisintegration (using gamma rays to split nuclei). It's raw, universe-core power in a (hopefully) controllable package.
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