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Prepared by: Mohapi Thebe(UWC & Necsa-SA) Supervisor: P rof. M. V. Frontasyeva (JINR-RU)

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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Prepared by: Mohapi Thebe(UWC & Necsa-SA) Supervisor: P rof. M. V. Frontasyeva (JINR-RU)

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  1. 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)

  2. Layout • Definition: NAA • Methodology and some practical work • Introduction to NAA lab at FLNP • Discuss-Analytical Investigations At IBR-2M Reactor

  3. 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

  4. 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)

  5. 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

  6. 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

  7. Experimental room insidethe reactor’s building Samples Types of containers

  8. 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

  9. ?Thanks For Your Attention

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