Different methodologies in neutron activation to approach the full analysis of environmental and nutritional samples |
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Authors: | M C Freitas Z Révay L Szentmiklósi I Dionísio H M Dung A M G Pacheco |
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Institution: | (1) Reactor-ITN, Technological and Nuclear Institute, E.N. 10, 2686-953 Sacavém, Portugal;(2) Institute of Isotope Research, Hungarian Academy of Sciences, Konkoly-Thege M. út 29-33, P.O. Box 77, H-1525 Budapest, Hungary;(3) CERENA-IST, Technical University of Lisbon, Av. Rovisco Pais 1, 1049-001 Lisboa, Portugal |
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Abstract: | Different methodologies of neutron activation analysis (NAA) are now available at the Technological and Nuclear Institute
(Sacavém, Portugal), namely Compton suppression, epithermal activation, replicate and cyclic activation, and low energy photon
measurement. Prompt gamma activation analysis (PGAA) will be implemented soon. Results by instrumental NAA and PGAA on environmental
and nutritional samples are discussed herein, showing that PGAA — carried out at the Institute of Isotope Research (Budapest,
Hungary) — brings about an effective input to assessing relevant elements. Sensitivity enhancement in NAA by Compton suppression
is also illustrated. Through a judicious combination of methodologies, practically all elements of interest in pollution and
nutrition terms can be determined. |
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