- natural radioisotope
- природный радиоизотоп; естественный радиоизотоп
English-Russian small dictionary of medicine. 2015.
natural radioisotope
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Radioisotope thermoelectric generator — A radioisotope thermoelectric generator (RTG, RITEG) is an electrical generator which obtains its power from radioactive decay. In such a device, the heat released by the decay of a suitable radioactive material is converted into electricity by… … Wikipedia
Trace radioisotope — A trace radioisotope is a radioisotope that occurs naturally in trace amounts (i.e. extremely small). This natural formation can be from the decay of heavier nuclei such as uranium 235 decaying into thorium 231. Natural occurrence of… … Wikipedia
Synthetic radioisotope — A synthetic radioisotope is a radionuclide that is not found in nature: no natural process or mechanism exists which produces it, or it is so unstable that it decays away in a very short period of time. Examples include technetium 95 and… … Wikipedia
Europium — (pronEng|jʊˈroʊpiəm) is a chemical element with the symbol Eu and atomic number 63. It was named after the continent Europe. Characteristics Europium is the most reactive of the rare earth elements; it rapidly oxidizes in air, and resembles… … Wikipedia
Isotopes of europium — Naturally occurring europium is composed of 2 isotopes, 151Eu and 153Eu, with 153Eu being the most abundant (52.2% natural abundance). While 153Eu is stable, 151Eu was recently found to be unstable to alpha decay with half life of 5 { 3}^{+11}… … Wikipedia
Isotopes of nitrogen — Natural Nitrogen (N) consists of two stable isotopes, nitrogen 14, which makes up the vast majority of naturally occurring nitrogen, and nitrogen 15. Fourteen radioactive isotopes (radioisotopes) have also been found so far, with atomic masses… … Wikipedia
Isotopes of yttrium — Natural yttrium (Y) is composed of only one isotope (Y 89). The most stable radioisotopes are Y 88 whichas a half life of 106.65 days and Y 91 with a half life of 58.51 days. All the other isotopes have half lives of less than a day except Y 87… … Wikipedia
Nuclear fuel — Process … Wikipedia
Radioactive waste — 2007 ISO radioactivity danger logo, designed in part for long term radioactive waste depositories which might survive into a far future time in which all knowledge of the meaning of present common radiation danger symbols and signs has been lost… … Wikipedia
dating — I In geology and archaeology, the process of determining an object s or event s place within a chronological scheme. Scientists may use either relative dating, in which items are sequenced on the basis of stratigraphic clues (see stratigraphy) or … Universalium
Environmental radioactivity — is produced by radioactive materials in the human environment. While some radioisotopes, such as strontium 90 (90Sr) and technetium 99 (99Tc), are only found on Earth as a result of human activity, and some, like potassium 40 (40K), are only… … Wikipedia
