☢️ Nuclear Fission Chain Reaction

Neutrons: 0 Fissions: 0 k: — 🇺🇦 UK ← Back
Neutron-induced fission: one neutron splits a U-235 nucleus releasing ν new neutrons. Enrichment sets U-235 fraction; moderation slows neutrons via elastic scattering (thermal neutrons fission more efficiently). k<1 subcritical — k≈1 critical — k>1 supercritical.