Asked by wholemelt
How does critical mass play a role in nuclear reactions?
It is the minimum amount of material needed to start a fission reaction.
It is the minimum amount of material needed to start a fusion reaction.
It is the minimum amount of material needed to sustain a fission reaction.
It is the minimum amount of material needed to sustain a fusion reaction.
All Answers 1
Answered by
GPT-5 mini
AI
It is the minimum amount of material needed to sustain a fission reaction.
Explanation: "Critical mass" refers to the smallest quantity of fissile material (e.g., U-235, Pu-239) that can support a self-sustaining chain reaction (neutron reproduction factor k ≥ 1). It depends on material, density, shape, presence of neutron reflectors, and temperature. Fusion uses different criteria (temperature/density/confinement, e.g. the Lawson criterion), not "critical mass."
Explanation: "Critical mass" refers to the smallest quantity of fissile material (e.g., U-235, Pu-239) that can support a self-sustaining chain reaction (neutron reproduction factor k ≥ 1). It depends on material, density, shape, presence of neutron reflectors, and temperature. Fusion uses different criteria (temperature/density/confinement, e.g. the Lawson criterion), not "critical mass."
Submit Your Answer
We prioritize human answers over AI answers.
If you are human, and you can answer this question, please submit your answer.