sievert

sievert
The SI unit of ionizing radiation effective dose, equal to the absorbed dose in gray, weighted for both the quality of radiation in question and the tissue response to that radiation. The unit is the joule per kilogram and 1 Sv = 100 rem. See effective dose, equivalent dose.

* * *

sie·vert 'sē-vərt n an SI unit for the dosage of ionizing radiation equal to 100 rems abbr. Sv
Sievert Rolf Maximilian (1896-1966)
Swedish physicist. Sievert was a pioneer in radiation physics and protection from radiation. He served as head of the physics laboratory at Sweden's Radiumhemmet from 1924 to 1937, when he became head of the department of radiation physics at the Karolinska Institute. He played a pioneering role in the measurement of doses of radiation especially in its use in the diagnosis and treatment of cancer. In later years he focused his research on the biological effects of repeated exposure to low doses of radiation. In 1964 he founded the International Radiation Protection Association, serving for a time as its chairman. He also chaired the United Nations Scientific Committee on the Effects of Atomic Radiation. In 1979 a scientific conference named a unit for the dosage of ionizing radiation in his honor.

* * *

n.
the SI units of dose equivalent, being the dose equivalent when the absorbed dose of ionizing radiation multiplied by the stipulated dimensionless factors is 1 J kg-1. As different types of radiation cause different effects in biological tissue a weighted absorbed dose, called the dose equivalent, is used in which the absorbed dose is modified by multiplying it by dimensionless factors stipulated by the International Commission on Radiological Protection. The sievert has replaced the rem. Symbol: Sv.

* * *

sie·vert (Sv) (seґvərt) the SI unit of radiation absorbed dose equivalent, defined as that producing the same biologic effect in a specified tissue as 1 gray of high-energy x-rays; 1 sievert equals 100 rem.

Medical dictionary. 2011.

Look at other dictionaries:

  • 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

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”