fission ratio
111Masse critique (réaction nucléaire) — Pour les articles homonymes, voir masse critique. La masse critique d un matériau fissile est la quantité de ce matériau nécessaire au déclenchement d une réaction nucléaire en chaîne de fission nucléaire. Sommaire 1 Caractérisation …
112bacteria — bacterial, adj. bacterially, adv. /bak tear ee euh/, n.pl., sing. bacterium / tear ee euhm/. ubiquitous one celled organisms, spherical, spiral, or rod shaped and appearing singly or in chains, comprising the Schizomycota, a phylum of the kingdom …
113cosmos — /koz meuhs, mohs/, n., pl. cosmos, cosmoses for 2, 4. 1. the world or universe regarded as an orderly, harmonious system. 2. a complete, orderly, harmonious system. 3. order; harmony. 4. any composite plant of the genus Cosmos, of tropical… …
114star — starless, adj. /stahr/, n., adj., v., starred, starring. n. 1. any of the heavenly bodies, except the moon, appearing as fixed luminous points in the sky at night. 2. Astron. any of the large, self luminous, heavenly bodies, as the sun, Polaris,… …
115Rubidium-strontium dating — The rubidium strontium dating method is a radiometric dating technique that geologists use to determine the age of rocks.Development of this process was aided by Fritz Strassmann, who later moved onto discovering nuclear fission with Otto Hahn… …
116Deuterium — Hydrogen 2 Full table General Name, symbol deuterium, 2H or D Neutrons 1 …
117Fine-structure constant — The fine structure constant or Sommerfeld fine structure constant, usually denoted alpha ,, is the fundamental physical constant characterizing the strength of the electromagnetic interaction.It is a dimensionless quantity, and thus its numerical …
118Boric acid — Boric acid …
119Ionic liquid — An ionic liquid is a liquid that contains essentially only ions. Some ionic liquids, such as ethylammonium nitrate are in a dynamic equilibrium where at any time more than 99.99% of the liquid is made up of ionic rather than molecular species. In …
120Subcritical reactor — A subcritical reactor is a nuclear fission reactor that produces fission without achieving criticality. Instead of a sustaining chain reaction, a subcritical reactor uses additional neutrons from an outside source. A reactor coupled to a particle …
