activation analysis
noun
: an analytical method used to determine the chemical elements comprising a material by bombarding it with particles (such as neutrons or gamma rays) to produce radioactive atoms whose emissions are indicative of the elements present
Activation analysis is one of the most sensitive and versatile techniques possible for elemental analysis. The technique involves irradiation of a sample with neutrons, charged particles or photons to induce instability in some of the sample atoms.—M. D. Glascock
see also neutron activation analysis
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