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| Category | Energy released |
|---|---|
| Cold neutrons | <0.003 eV |
| Slow (thermal) neutrons | 0.003–0.4 eV |
| Slow (epithermal) neutrons | 0.4–100 eV |
| Intermediate neutrons | 100 eV–200 keV |
| Fast Neutrons | 200 keV–10 MeV |
| High energy (relativistic) neutrons | >10 MeV |
| Source: L’Annunziata (2016) | |
