Search results
Critical Mass is an award-winning full-service digital experience design agency with a relentless focus on the customer. We're headquartered in Calgary, Canada with global offices in US, UK, Hong Kong, and South America.
May 31, 2024 · The 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.
In 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
critical 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.
the 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.
The critical mass of a fissionable substance is the minimum amount of fissionable material that will support a self-sustaining chain reaction. At this mass the neutrons released as a product of one fission reaction can cause neighboring atoms to fission.
Jan 3, 2021 · The concept of critical mass involves two competing effects. As nuclei fission, they emit secondary neutrons. A fundamental empirical law of nuclear physics, derived in Sect. 2.1, shows that while some neutrons will cause other fissions, the remainder will reach the surface of the mass and escape.
If the conditions are such that the neutrons are lost at a faster rate than they are formed by fission, the chain reaction will not be self-sustaining. At the point where the chain reaction can become self-sustaining, this is referred to as critical mass.
critical mass. phys. Minimum mass of fissionable material in a nuclear reactor or nuclear bomb that will sustain a chain reaction. A subcritical mass is one in which the chain reaction dies out. A supercritical mass is one in which the chain reaction builds up explosively.
Jan 1, 2014 · The concept of critical mass involves two competing effects. As nuclei fission, they emit secondary neutrons. A fundamental empirical law of nuclear physics, derived in Sect. 2.1, shows that while some neutrons will cause other fissions, the remainder will reach the surface of the mass and escape.
