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neutron activation analysis

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neutron activation analysis

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 form radioactive isotopes that emit gamma rays as they decay. The energy spectrum of the emitted rays is detected with a counter and constituent elements and concentrations are identified by the characteristic energy spectrum of emitted rays and its intensity.
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In the laboratory, the reactor is used as a source of neutrons for an analytical technique known as Neutron Activation Analysis (NAA).
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Researchers from the Massachusetts Institute of Technology (MIT) conducted a heavy-metal exposure biomarker study for arsenic and chromium in hair specimens using neutron activation analysis.
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Then Hoffman, a young University of Toronto-trained geologist refined a technique called Instrumental Neutron Activation Analysis.
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