Respuesta :
The critical mass is the minimum amount of fissionable material needed to sustain a chain reaction. Atomic bombs and nuclear reactors are two ways to harness the large energy released during nuclear fission.
What is critical mass?
The smallest quantity of fissile material required for a sustained nuclear chain reaction is known as a critical mass in nuclear engineering. The nuclear properties of a fissionable substance—more particularly, its nuclear fission cross-section—as well as its density, shape, enrichment, purity, temperature, and environment—all affect the critical mass of that substance. The idea is crucial to the design of nuclear weapons. A mass of fissile material is considered to be in a critical state when a nuclear chain reaction in the mass is self-sustaining and there is no change in power, temperature, or neutron population.
The effective neutron multiplication factor k, or the average number of neutrons released per fission event that trigger another fission event instead of being neutralized, determines the numerical value of a critical mass.
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