sievert

sievert
/see"veuhrt/, Physics. n.
the SI unit of dose equivalent when the absorbed dose is measured in gray. Abbr.: Sv Cf. gray2, rem.
[named in honor of Swedish radiologist Rolf Maximilian Sievert (1896-1966)]

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      unit of radiation absorption in the International System of Units (SI). The sievert has been recommended by the International Commission on Radiation Units and Measurements (ICRU) as a substitute for the rem, the long-standing special unit for measuring biological absorption of radiation. Like the rem, the sievert takes into account the relative biologic effectiveness (RBE) of ionizing radiation, since each form of such radiation—e.g., X rays, gamma rays, neutrons—has a slightly different effect on living tissue. Accordingly, one sievert is generally defined as the amount of radiation roughly equivalent in biologic effectiveness to one gray (or 100 rads) of gamma radiation. The sievert is inconveniently large for various applications, and so the millisievert (mSv), which equals 1/1,000 sievert, is frequently used instead. One millisievert corresponds to 10 ergs (erg) of energy of gamma radiation transferred to one gram of living tissue.

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Universalium. 2010.

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  • sievert — [ sivɛrt ] n. m. • 1977; du nom du physicien ♦ Métrol. Unité de mesure d équivalent de dose de radiation absorbée (symb.Sv), correspondant à la dose de rayonnement absorbée par un organisme vivant soumis à 1 gray de rayons X d une énergie de 250… …   Encyclopédie Universelle

  • Sievert — bezeichnet Sievert (Einheit), Sv, Einheit der Äquivalentdosis Sievert (Vorname), männlicher Vorname Sievert (Familienname), ein Familienname Diese Seite ist eine Begriffsklärung zur Untersche …   Deutsch Wikipedia

  • sievert — (Sv) Unidad de radiación equivalente a una dosis unitaria. El sievert tiene idénticas unidades para el gris y se calcula multiplicando la dosis absorbida por el factor de calidad, número que se ha determinado para comparar de forma precisa las… …   Diccionario médico

  • sievert — (De R. Sievert, 1896 1966, físico sueco). m. Fís. Unidad de dosis equivalente de radiación del Sistema Internacional, igual a un julio por kilogramo. (Símb. Sv) …   Diccionario de la lengua española

  • Sievert — Sievert. См. зиверт. (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.

  • Sievert — (Sv) Зиверт (Зв) в системе единиц СИ единица эквивалентной дозы. 1 Зв=1 Дж/кг =100 бэр. Термины атомной энергетики. Концерн Росэнергоатом, 2010 …   Термины атомной энергетики

  • sievert — s. m. [Física] Unidade de medida do Sistema Internacional equivalente a 100 rems (símbolo Sv) …   Dicionário da Língua Portuguesa

  • sievert — (izg. sìvert) m DEFINICIJA fiz. SI jedinica ekvivalentne doze ionizirajućeg zračenja (simbol Sv), (Sv = J/kg) ETIMOLOGIJA prema švedskom radiologu M. Sievertu (1896 1966) …   Hrvatski jezični portal

  • sievert — [sē′vərt] n. the basic unit in the SI system that is used to measure the amount of biological damage caused by various types of ionizing radiation, equal to the dose that produces the same amount of damage in human tissue as one gray of X rays… …   English World dictionary

  • Sievert — Pour les articles homonymes, voir SV. Le sievert (symbole: Sv) est l « unité utilisée pour donner une évaluation de l impact des rayonnements sur l homme » [1] …   Wikipédia en Français

  • Sievert — The sievert (symbol: Sv) is the International System of Units (SI) SI derived unit of dose equivalent radiation. It attempts to quantitatively evaluate the biological effects of ionizing radiation as opposed to just the absorbed dose of radiation …   Wikipedia

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