Secular equilibrium

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Notion

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Science and technology

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What Wikipedia says

In nuclear physics, secular equilibrium is a situation in which the quantity of a radioactive isotope remains constant because its production rate (e.g., due to decay of a parent isotope) is equal to its decay rate.

Excerpt from the Wikipedia article “Secular equilibrium”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Zereshk, Public domain, via Wikimedia Commons.