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Neutron Activation Analysis Summer School P ractice Joint Institute for Nuclear Research in Dubna. Prepared by: Mohapi Thebe(UWC & Necsa-SA) Supervisor: P rof. M. V. Frontasyeva (JINR-RU). Layout . Definition: NAA Methodology and some practical work Introduction to NAA lab at FLNP
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Neutron Activation AnalysisSummer School PracticeJoint Institute for Nuclear Research in Dubna Prepared by: Mohapi Thebe(UWC & Necsa-SA) Supervisor:Prof. M. V. Frontasyeva(JINR-RU)
Layout • Definition: NAA • Methodology and some practical work • Introduction to NAA lab at FLNP • Discuss-Analytical Investigations At IBR-2M Reactor
Introduction • Neutron Activation Analysis • Analytical technique for qualitative and quantitative • determination of elements • Based upon the conversion of stable nuclei into radioactive • nuclei by radiation with neutrons • Several types of radiation are emitted but γ-radiation offers • the best characteristics for selective and simultaneous • determination of elements. • Types of NAA : ENAA,INAA • CNAA • PNAA &DNAA
Introduction(Con’t) • Fast or fission neutrons (E~100 keV-25 MeV) • Epithermal neutrons (E~0.5 eV-100keV) • Thermal neutrons (E~0.025 eV)
Procedure in NAA Gamma Spectra from a Sample of Pottery Irradiated for 24 Hours, Decayed for 9 Days, and Counted for 30 Minutes on a HPGe Detector
FRANK LABORATORY OF NEUTRON PHYSICS JOINT INSTITUTE FOR NUCLEAR RESEARCH 1956 Ilґja Mikhailovich Frank (1908-1990) The Nobel Prize in Physics 1958 "for the discovery and the interpretation of the Cherenkov effect" IBR-2 Pulsed Reactor
Experimental room insidethe reactor’s building Samples Types of containers
Epithermal Cyclic Instrumental neutron activation neutron activation analysis neutron activation analysis analysis ENAA INAA CNAA Material Science Life Sciences • Biotechnologies: development of new pharmaceuticals and cleaning the environemnt from toxic elements (biosorption) • NAA for the technological process of synthesis of fine crystalline diamonds • Analysis of archeological and museum objects from Russian and other countries • NAA for decommissioning of Nuclear Power Plants and utulization of industrial wastes . • Biomonitoring of atmospheric depositionof heavy metals and other elements (Project REGATA) • Control of quality and safety of foodstuffs, grown in industrially contaminated areas of RF and South Africa (grant SA) • Assessment of different ecosystems and their impact on human health ANALYTICAL INVESTIGATIONS AT IBR-2M REACTOR