Even when the lights go out and nuclear reactors are turned off, the story inside the reactor core still has a great deal to tell. Radioactive, long-lived fission products continue to decay for months or even years, producing a faint flux of a specific type of particle known as antineutrinos. (...

Source: [Phys.org](https://phys.org/news/2026-08-antineutrinos-spent-nuclear-fuel-emissions.html)

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