activation 

in radiochemistry
https://doi.org/10.1351/goldbook.A00095
The process of inducing radioactivity by irradiation. In general, a specification is added of the type of incident radiation (e.g. nuclear, neutron, photon) or its energy (e.g. thermal, fast).
Source:
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2515 [Terms] [Paper]
Citation: 'activation' 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.A00095 RIS BibTex EndNote
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Last revised: February 24, 2014