fission mode

См. также в других словарях:

• fission — n. & v. n. 1 Physics the spontaneous or impact induced splitting of a heavy atomic nucleus, accompanied by a release of energy. 2 Biol. the division of a cell etc. into new cells etc. as a mode of reproduction. v.intr. & tr. undergo or cause to… …   Useful english dictionary

• Spontaneous fission — (SF) is a form of radioactive decay characteristic of very heavy isotopes, and is theoretically possible for any atomic nucleus whose mass is greater than or equal to 100 u (elements near ruthenium). In practice, however, spontaneous fission is… …   Wikipedia

• nuclear fission — fission (def. 2). [1885 90] * * * Division of a heavy atomic nucleus into two fragments of roughly equal mass, accompanied by the release of a large amount of energy, the binding energy of the subatomic particles. The energy released in the… …   Universalium

• Propulsion par fragments de fission — Cet article concerne l utilisation directe de l énergie cinétique des fragments de fission pour la propulsion . Pour pour le chauffage direct d un fluide propulsif, voir Propulsion nucléaire thermique#Réacteur à fragments de fission. La… …   Wikipédia en Français

• Bombe à fission — Bombe A Pour les articles homonymes, voir Bombe. Explosion atomique de 14 kilotonnes lors de l essai américain XX 27 CHARLIE dans le site d essais du Nevada en …   Wikipédia en Français

• Commonly-used gamma emitting isotopes — Fission products Caesium 137 is a radioactive isotope which is formed mainly by nuclear fission. It has a half life of 30 years, and decays by pure beta decay to a metastable state of barium 137 (Ba 137m). Barium 137m has a half life of minutes… …   Wikipedia

• radiation measurement — ▪ technology Introduction       technique for detecting the intensity and characteristics of ionizing radiation, such as alpha, beta, and gamma rays or neutrons, for the purpose of measurement.       The term ionizing radiation refers to those… …   Universalium

• protozoan — /proh teuh zoh euhn/, n., pl. protozoans, (esp. collectively) protozoa / zoh euh/, adj. Biol. n. 1. any of a diverse group of eukaryotes, of the kingdom Protista, that are primarily unicellular, existing singly or aggregating into colonies, are… …   Universalium

• Behavior of nuclear fuel during a reactor accident — This page is devoted to a discussion of how uranium dioxide nuclear fuel behaves during both normal nuclear reactor operation and under reactor accident conditions such as overheating. Work in this area is often very expensive to conduct, and so… …   Wikipedia

• TRANSURANIENS — Jusqu’en 1940, l’élément chimique le plus lourd connu était l’uranium. On le trouve dans divers minerais, en particulier dans la pechblende (U38). L’abondance de cet élément dans l’écorce terrestre est estimée à 4 憐 10–4 p. 100. Le numéro… …   Encyclopédie Universelle

• transuranium element — Any of the chemical elements after uranium in the periodic table (with atomic numbers greater than 92). All are radioactive (see radioactivity), with half lives ranging from tens of millions of years to fractions of a millisecond. Only two,… …   Universalium