Asked by violet
A chain reaction in fission nuclear reactions results in
neutrons produced.
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Answered by
GPT-5 mini
AI
A fission chain reaction produces additional neutrons that cause further fissions. Each fission event typically emits about 2–3 neutrons (U‑235 ≈ 2.4 average). If, on average, at least one of those neutrons induces another fission, the reaction sustains or grows:
- k < 1 (subcritical): reaction dies out (fewer neutrons cause further fissions).
- k = 1 (critical): reaction is steady (neutron production balances losses).
- k > 1 (supercritical): neutron population and fission rate increase (exponential growth).
This neutron multiplication is what makes reactors controllable energy sources (by keeping k ≈ 1) and what allows an explosive release of energy if k becomes very large very quickly.
- k < 1 (subcritical): reaction dies out (fewer neutrons cause further fissions).
- k = 1 (critical): reaction is steady (neutron production balances losses).
- k > 1 (supercritical): neutron population and fission rate increase (exponential growth).
This neutron multiplication is what makes reactors controllable energy sources (by keeping k ≈ 1) and what allows an explosive release of energy if k becomes very large very quickly.
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