activation analysis. An extremely sensitive technique for analyzing trace amounts of elements in a sample. The sample is bombarded with neutrons in a nuclear reactor, making it radioactive. Different elements produce different 'signatures' in the induced radiation which makes determination of their concentration in the sample possible.
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http://antoine.frostburg.edu/chem/senese/101/glossary/n.shtml
Neutron activation analysis (NAA) is a nuclear process used for determining the concentrations of elements in a vast amount of materials. NAA allows discrete sampling of elements as it disregards the chemical form of a sample, and focuses solely on its nucleus. The method is based on neutron activation and therefore requires a source of neutrons. ...
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http://en.wikipedia.org/wiki/Neutron_activation_analysis
(from the article `radiation measurement`) For radiation energies of several MeV and lower, charged particles and fast electrons do not induce nuclear reactions in absorber materials. Gamma ... Neutron-activation analysis is based on the fact that certain elements are activated or become radiogenic when they are bombarded with a flux of...
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http://www.britannica.com/eb/a-z/n/29
Chemical analysis used to determine the composition of a wide range of materials found in archaeological contexts. A specimen is bombarded with neutrons, which interact with nuclei in the sample to...
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http://www.encyclo.co.uk/local/20688
Activation analysis in which the specimen is bombarded with neutrons. Identification is made by measuring the resulting radioisotopes. ... (12 Dec 1998) ...
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http://www.encyclo.co.uk/local/20973
A method of identifying isotopes of an element by bombarding them with neutrons and observing the ch
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http://www.encyclo.co.uk/local/22392
A method of identifying isotopes of an element by bombarding them with neutrons and observing the characteristic radioactive decay products emitted.
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http://www.scientificpsychic.com/etc/geology-glossary.html
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