natural radioactivity

См. также в других словарях:

• natural radioactivity — noun Radioactivity that is found in nature • • • Main Entry: ↑natural …   Useful english dictionary

• natural radioactivity — gamtinis radioaktyvumas statusas T sritis fizika atitikmenys: angl. natural radioactivity vok. natürliche Radioaktivität, f rus. естественная радиоактивность, f pranc. radioactivité naturelle, f …   Fizikos terminų žodynas

• Average dose due to natural radioactivity deposited internally — ▪ Table Average dose due to natural radioactivity deposited internally isotope radioactivity in millibecquerel (mBq)* radiation dose in mSv (per year) critical organ carbon 14 2.2(10−7) per kilogram beta rays 0.016 gonads potassium 40 3.9(10−7)… …   Universalium

• External dose due to natural radioactivity in soil or rock — ▪ Table External dose due to natural radioactivity in soil or rock source dose in mSv per year ordinary regions 0.25–1.6 active regions granite in France 1.8–3.5 houses in Switzerland (alum shale) 1.58–2.2 monazite alluvial deposits in Brazil… …   Universalium

• natural background — noun The radiation due to natural radioactivity and to cosmic rays, enhanced by contamination and fallout • • • Main Entry: ↑natural …   Useful english 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

• Natural scientific research in Canada — This article outlines the history of natural scientific research in Canada, including mathematics, physics, astronomy, space science, geology, oceanography, chemistry, biology, medical research and psychology. The social sciences are not treated… …   Wikipedia

• 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

• natural gamma-ray log — n a record of the natural radioactivity of the lithologies encountered in the borehole environment. During recording of geophysical logs, the amount of natural radiation is recorded and presented in either counts per second (CPS) or American… …   Coke&Coal Terminology

• Natural uranium — (NU) refers to refined uranium with the same isotopic ratio as found in nature. It contains 0.7 % uranium 235, 99.3 % uranium 238, and a trace of uranium 234 by weight. In terms of the amount of radioactivity, approximately 2.2 %… …   Wikipedia

• radioactivity — The property of some atomic nuclei of spontaneously emitting gamma rays or subatomic particles (α and β rays) by the process of nuclear disintegration and measured in disintegrations per second (dps). One dps is equal to 1 becquerel, and 3.7 ×… …   Medical dictionary