Critical Mass

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Related to subcritical: Subcritical flow
Radiation safety The minimum amount of material—mass of a particular radioisotope—required for it to reach ‘criticality’ and undergo a spontaneous fission chain reaction, releasing a lethal shower of neutron and gamma radiation
Research A popular term for the minimum number of persons working in related fields in a particular place, below which creative thinking and interaction may be suboptimal
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References in periodicals archive ?
The population of prompt neutrons induced from a fast neutron burst in a subcritical system decreases exponentially.
Figures 13 and 14 show the effects of the countersunk in the laminate plate on the delamination evolution and the initial subcritical failure load under different delamination factors.
Among these influential factors, extraction temperature is one of the crucial parameters, especially under the subcritical condition.
According to the authors' previous work, the pH of water soaked with subcritical and supercritical C[O.sub.2] under the same pressure and temperature will be smaller than 3 [11].
Under autogenous pressure in a 50 mL stainless steel autoclave reactor, the depolymerization of PEN in subcritical water was investigated without displacing the air in the reactor.
Prediction of lateral outflow over triangular labyrinth side weirs under subcritical conditions using soft computing approaches.
All runs except Runs numbers 11 and 15 achieved subcritical conditions without vapor formation as shown in Figure 1.
In this paper we introduce a method of approximating the quasistationary distribution of a stochastic model in the subcritical regime, using a technique that has been used previously to approximate rare large-deviation events in supercritical dynamics [14-16].
These consequences add together, giving C[O.sub.2] excellent characteristics for subcritical vapor compression refrigeration cycles.
[8] presented a dynamic model for subcritical flow analysis in junction of channels.
found that polyester thermosets can be decomoposed in subcritical water, generating useful raw materials for new polyesters.