1. Prepared by: Mohapi Thebe(UWC & Necsa-SA) Supervisor: Prof. M. V. Frontasyeva(JINR-RU) 1 Neutron Activation Analysis Summer School Practice Joint Institute for Nuclear Research in Dubna

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

3. Introduction 3 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) 4 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 5 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 Il ґ ja Mikhailovich Frank (1908-1990) The Nobel Prize in Physics 1958 "for the discovery and the interpretation of the Cherenkov effect" IBR-2 Pulsed Reactor 6

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

8.  Biomonitoring of atmospheric deposition of 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  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. Instrumental neutron activation analysis INAA Cyclic neutron activation analysis CNAA Epithermal neutron activation analysis ENAA Life Sciences Material Science ANALYTICAL INVESTIGATIONS AT IBR-2M REACTOR 8

9. ? Thanks For Your Attention 9