Title: partial decay constant
Long Title: IUPAC Gold Book - partial decay constant
DOI: 10.1351/goldbook.P04410
Status: current

Definition
For a radionuclide: the probability in unit time for the decay of one of its nuclei by one of several modes of decay.

Related Terms
- probability: https://goldbook.iupac.org//terms/view/P04855
- radionuclide: https://goldbook.iupac.org//terms/view/R05116

Source
- PAC, 1982, 54, 1533. 'Glossary of terms used in nuclear analytical chemistry (Provisional)' on page 1547 (https://doi.org/10.1351/pac198254081533)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/P04410/html
- json: https://goldbook.iupac.org/terms/view/P04410/json
- xml: https://goldbook.iupac.org/terms/view/P04410/xml

Citation: Citation: 'partial decay constant' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.P04410
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Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.
Accessed: 2026-04-21T00:49:16+00:00