## Wikipedia - Equilibri secular (ca) Wikipedia - Kesetimbangan sekuler (id) Wikipedia - Secular equilibrium (en) Wikipedia - Вікова рівновага (uk) secular equilibrium

https://doi.org/10.1351/goldbook.S05532
@[email protected] where the @[email protected] of the @[email protected] is so long that the change of its @[email protected] 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]