activation analysis (nuclear) 

https://doi.org/10.1351/goldbook.A00096
A kind of elemental or isotopic analysis based on the measurement of characteristic radiation from nuclides formed directly or indirectly by activation of the test portion. In general, a specification is added of the type of the incident radiation (e.g. neutron, photon) and its energy (e.g. thermal, fast).
Sources:
Orange Book, 2nd ed., p. 210 [Terms] [Book]
PAC, 1994, 66, 2513. (Nomenclature for radioanalytical chemistry (IUPAC Recommendations 1994)) on page 2515 [Terms] [Paper]