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Isotopic abundance
| Глоссарий по атомной энергетике |
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Содержание изотопа, русский
Относительное количество атомов данного изотопа в смеси изотопов элемента, выраженное в виде доли от всех атомов элемента.
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Abundance, английский
- Is a measure of how many fish are in a population or a fishing ground. see relative abundance and absolute abundance.
- The number of organisms in a population, combining “intensity“ (density within inhabited areas) and “prevalence“ (number and size of inhabited areas).
Abundance zone, английский
A biozone consisting of a stratum or body of strata in which the abundance of a particular taxon or specified group of taxa is significantly greater than is usual in the adjacent parts of the section, regardless of either association or range (see section 7.d.6.).
Isotopic age, английский
An age expressed in years or millions of years calculated from the quantitative determination of the content of the parent and daughter nuclides during the decay of radioactive elements. the abbreviations ka for thousand (103), ma for million (106), and ga for billion (milliard or thousand million, 109) years are now generally used to express the length of time before the present (years ago), not the duration of a past geological time interval. 124 k
Isotopic axis, английский
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Licensing procedure, английский
Ionizing radiation source, английский
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