half life

of a radionuclide
synonym: radioactive half life
https://doi.org/10.1351/goldbook.H02717
For a single radioactive decay process, the time required for the activity to decrease to half its value by that process.
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2520 [Terms] [Paper]
Citation: 'half life' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.H02717 RIS BibTex EndNote
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