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Bookmark or Share- Critical mass | Nuclear Reactions, Fission & Fusion | Britannicacritical mass, in nuclear physics, the minimum amount of a given fissile material necessary to achieve a self-sustaining fission chain reaction under stated conditions. Its size depends on several factors, including the kind of fissile material used, its concentration and purity, and the composition and geometry of the surrounding reaction system.
- Critical Mass - Atomic ArchiveBy surrounding the fissionable material with a suitable neutron "reflector", the loss of neutrons can reduced and the critical mass can be reduced. By using a neutron reflector, only about 11 pounds (5 kilograms) of nearly pure or weapon's grade plutonium 239 or about 33 pounds (15 kilograms) uranium 235 is needed to achieve critical mass.
- CRITICAL MASS | English meaning - Cambridge Dictionarythe size or number that something needs to reach before a particular change or development can happen: They believe that they have achieved critical mass, that is a size that is necessary for the company to survive. The challenge is to attract a critical mass of customers that will enable the business to start making a profit.
- Critical mass Definition & Meaning - Merriam-WebsterThe meaning of CRITICAL MASS is a size, number, or amount large enough to produce a particular result. How to use critical mass in a sentence.
- Critical mass - WikipediaIn nuclear engineering, a critical mass is the smallest amount of fissile material needed for a sustained nuclear chain reaction. The critical mass of a fissionable material depends upon its nuclear properties (specifically, its nuclear fission cross-section), density, shape, enrichment, purity, temperature, and
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