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]