- isotope decays by positron emission
- Макаров: изотоп испытывает позитронный распад
Универсальный англо-русский словарь. Академик.ру. 2011.
isotope decays by positron emission
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Positron emission tomography — (PET) is a nuclear medicine imaging technique which produces a three dimensional image or map of functional processes in the body. The system detects pairs of gamma rays emitted indirectly by a positron emitting radionuclide (tracer), which is… … Wikipedia
Positron emission — is a type of beta decay, sometimes referred to as beta plus ( beta;+). In beta plus decay, a proton is converted, via the weak force, to a neutron, a positron (also known as the beta plus particle , the antimatter counterpart of an electron), and … Wikipedia
Iridium — (pronEng|ɪˈrɪdiəm) is a chemical element that has the symbol Ir and atomic number 77. A very hard, brittle, silvery white transition metal of the platinum family, iridium is the second densest element and is the most corrosion resistant metal,… … Wikipedia
carbon 11 — a radioactive isotope of carbon, atomic mass 11, having a half life of 20.39 minutes; it decays by positron emission, with energy of 0.961 MeV, and is used as a tracer in positron emission tomography … Medical dictionary
nitrogen 13 — a radioactive isotope of nitrogen, atomic mass 13, having a half life of 9.97 minutes; it decays by positron emission (1.190 MeV) and is used as a tracer in positron emission tomography … Medical dictionary
oxygen 15 — an artificial radioactive isotope of oxygen, atomic mass 15, having a half life of 2.04 minutes; it decays by positron emission (1.70 MeV) and is used as a tracer in the measurement of regional blood volume and flow and oxygen metabolism by… … Medical dictionary
rubidium 82 — a radioactive isotope of rubidium, atomic mass 82, having a half life of 1.273 minutes; it decays by positron emission (3.15 MeV) and is used as a tracer in positron emission tomography … Medical 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
Radioactive decay — For particle decay in a more general context, see Particle decay. For more information on hazards of various kinds of radiation from decay, see Ionizing radiation. Radioactive redirects here. For other uses, see Radioactive (disambiguation).… … Wikipedia
radiation — radiational, adj. /ray dee ay sheuhn/, n. 1. Physics. a. the process in which energy is emitted as particles or waves. b. the complete process in which energy is emitted by one body, transmitted through an intervening medium or space, and… … Universalium
Beta decay — Nuclear physics Radioactive decay Nuclear fission Nuclear fusion Classical decays … Wikipedia
