thorium emanation

См. также в других словарях:

• thorium emanation — noun : thoron * * * thorium emanation, = thoron. (Cf. ↑thoron) …   Useful english dictionary

• émanation — [ emanasjɔ̃ ] n. f. • 1579; lat. ecclés. emanatio ♦ Action d émaner; la chose qui émane. 1 ♦ Théol. Manière dont le Fils procède du Père, et le Saint Esprit du Père et du Fils. ⇒ procession. ♢ Philos. Processus par lequel les êtres et le monde… …   Encyclopédie Universelle

• THORIUM — En 1828, Jöns Jacob Berzelius découvrit un nouveau métal qu’il baptisa thorium en l’honneur de Thor, dieu de la mythologie scandinave. Bien qu’il soit relativement rare, cet élément a été utilisé depuis longtemps dans l’industrie, principalement… …   Encyclopédie Universelle

• emanation — 1. Any substance that flows out or is emitted from a source or origin. 2. The radiation from a radioactive element. [L. e mano, pp. atus, to flow out] actinium e. radon 219. See emanon. radium e. radon 222. See emanon …   Medical dictionary

• Radon — This article is about the chemical element. For other uses, see Radon (disambiguation). astatine ← radon → francium Xe ↑ Rn ↓ Uuo …   Wikipedia

• Decay chain — In nuclear science, the decay chain refers to the radioactive decay of different discrete radioactive decay products as a chained series of transformations. Most radioactive elements do not decay directly to a stable state, but rather undergo a… …   Wikipedia

• Isotopes of radon — There are thirty four known isotopes of radon (Rn). The most stable isotope is 222Rn, which is a decay product (daughter product) of 226Ra, has a half life of 3.823 days and emits alpha particles. 220Rn is a natural decay product of thorium and… …   Wikipedia

• Radon — Radongas * * * Ra|don 〈a. [ ′ ] n.; s; unz.; chem. 〉 chem. Element, radioaktives Edelgas, Ordnungszahl 86; Sy 〈veraltet〉 Niton [zu lat. radius „Strahl“] * * * Ra|don [↑ Radium u. ↑ on (4)], das; s; Symbol …   Universal-Lexikon

• Friedrich von Lerch — (1909) Friedrich von Lerch (* 1879 in Preßburg; † 1947 in Wien) war ein österreichischer Physiker. Inhaltsverzeichnis 1 …   Deutsch Wikipedia

• Thoron — Tho|ron [↑ Thorium u. ↑ on (4)], das; s; Symbol: Tn: ↑ Radon. * * * Thoron   [zu Thorium] das, s, Thorium|emanation, chemisches Symbol Tn …   Universal-Lexikon

• thoron — ˈthōrˌän, ˈthȯˌrän noun ( s) Etymology: New Latin, from thor (from thorium) + on : a heavy radioactive gaseous isotope of the group of inert gases that is isotopic with radon and actinon, is formed by disintegration of thorium, emits alpha rays …   Useful english dictionary