iridium Ir 192

iridium Ir 192
an artificial radioactive isotope of iridium, atomic mass 192, with a half-life of 73.83 days; it emits beta particles (0.67 MeV) and gamma rays (0.296, 0.308, 0.317, 0.468, 0.589, 0.604, 0.612 MeV) and is used in radiotherapy.

Medical dictionary. 2011.

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  • Iridium — (pronEng|ɪˈrɪdiəm) is a chemical element that has the symbol Ir and atomic number 77. A very hard, brittle, silvery white transition metal of the platinum family, iridium is the second densest element and is the most corrosion resistant metal,… …   Wikipedia

  • iridium — [ iridjɔm ] n. m. • 1805; lat. iris, iridis « arc en ciel », à cause des couleurs variées qu offrent les combinaisons de ce métal ♦ Chim. Élément (Ir; no at. 77; m. at. 192), métal blanc très dur, cassant. L iridium s extrait de certains minerais …   Encyclopédie Universelle

  • Iridium-192 — (symbol Ir192m) is an isotope of Iridium. The m denotes that it is a metastable isomer. Its half life is 73.83 days. It decays by emitting beta particles and gamma radiation.Iridium 192 is used as an industrial radioisotope to locate areas of… …   Wikipedia

  • iridium — Symbol: Ir Atomic number: 77 Atomic weight: 192.217 Very hard and brittle, silvery metallic transition element. It has a yellowish cast to it. Salts of iridium are highly colored. It is the most corrosion resistant metal known, not attacked by… …   Elements of periodic system

  • iridium — i*rid i*um ([ i]*r[i^]d [i^]*[u^]m), n. [NL., fr. L. iris, iridis, the rainbow. So called from the iridescence of some of its solutions. See {Iris}.] (Chem.) A rare metallic element of atomic number 77, of the same group as platinum, which it… …   The Collaborative International Dictionary of English

  • Iridium [2] — Iridium Ir (Atomgew. 192,5, spez. Gew. 22,4), graues, hartes Metall der Platingruppe; Schmelzpunkt höher als der des Platins, ca. 2500° C. Es findet sich in Begleitung mit den übrigen Platinmetallen als seltenstes Element dieser Gruppe stets… …   Lexikon der gesamten Technik

  • Iridium (Chemisches Element) — Eigenschaften …   Deutsch Wikipedia

  • iridium — /i rid ee euhm, uy rid /, n. Chem. a precious metallic element resembling platinum: used in platinum alloys and for the points of gold pens. Symbol: Ir; at. wt.: 192.2; at. no.: 77; sp. gr.: 22.4 at 20°C. [1804; < L irid , s. of iris rainbow (see …   Universalium

  • Iridium — Eigenschaften …   Deutsch Wikipedia

  • Iridium — Pour les articles homonymes, voir Iridium (homonymie). Iridium Osmium ← Iridium …   Wikipédia en Français

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