secular equilibrium

https://doi.org/10.1351/goldbook.S05532
@R05084@ where the @H02717@ of the @P04805@ is so long that the change of its @A00114@ can be ignored during the period of interest and all activities remain constant.
Source:
PAC, 1982, 54, 1533. (Glossary of terms used in nuclear analytical chemistry (Provisional)) on page 1541 [Terms] [Paper]
Citation: 'secular equilibrium' in IUPAC Compendium of Chemical Terminology, 3rd ed. International Union of Pure and Applied Chemistry; 2006. Online version 3.0.1, 2019. https://doi.org/10.1351/goldbook.S05532 RIS BibTex EndNote
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Last revised: February 24, 2014