radioactivity


radioactivity
The spontaneous emission of radiation, generally alpha or beta particles, often accompanied by gamma rays, from the nuclei of an unstable isotope.

Military dictionary. 2000.

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  • radioactivity — a di*o*ac*tiv i*ty (r[=a] d[i^]*[ o]*[a^]k*t[i^]v [i^]*t[y^]), n. (Physics) a form of instability which is a property of the atomic nuclei of certain isotopes, which causes a spontaneous change in the structure of the nucleus, accompanied by… …   The Collaborative International Dictionary of English

  • radioactivity — radioactivity. См. радиоактивность. (Источник: «Англо русский толковый словарь генетических терминов». Арефьев В.А., Лисовенко Л.А., Москва: Изд во ВНИРО, 1995 г.) …   Молекулярная биология и генетика. Толковый словарь.

  • Radioactivity — Radioactivity. См. Радиоактивность. (Источник: «Металлы и сплавы. Справочник.» Под редакцией Ю.П. Солнцева; НПО Профессионал , НПО Мир и семья ; Санкт Петербург, 2003 г.) …   Словарь металлургических терминов

  • Radioactivity — См. Радиоактивность Термины атомной энергетики. Концерн Росэнергоатом, 2010 …   Термины атомной энергетики

  • radioactivity — (n.) 1899, from RADIOACTIVE (Cf. radioactive) + ITY (Cf. ity) …   Etymology dictionary

  • radioactivity — ► NOUN 1) the emission of ionizing radiation or particles caused by the spontaneous disintegration of atomic nuclei. 2) radioactive particles …   English terms dictionary

  • radioactivity — /ray dee oh ak tiv i tee/, n. Physics, Chem. the phenomenon, exhibited by and being a property of certain elements, of spontaneously emitting radiation resulting from changes in the nuclei of atoms of the element. Also called activity. [1895… …   Universalium

  • radioactivity — noun … OF RADIOACTIVITY ▪ level ▪ The soil contains 30 times the acceptable level of radioactivity. VERB + RADIOACTIVITY ▪ produce, release ▪ the amount of radioactivity released b …   Collocations dictionary

  • radioactivity — n. 1) to emit, generate, produce radioactivity 2) (a) dangerous (level of) radioactivity * * * generate produce radioactivity (a) dangerous (level of) radioactivity to emit …   Combinatory dictionary

  • radioactivity — Synonyms and related words: activity, artificial radioactivity, contamination, curiage, decontamination, fallout, half life, natural radioactivity, nuclear radiation, radiant energy, radiation, radioactive radiation, radiocarbon dating,… …   Moby Thesaurus

  • radioactivity — ra|di|o|ac|tiv|i|ty [ˌreıdiəuækˈtıvıti US diou ] n [U] the sending out of ↑radiation (=a form of energy) when the ↑nucleus (=central part) of an atom has broken apart ▪ the discovery of radioactivity ▪ high levels of radioactivity …   Dictionary of contemporary English