Neutron Activation Analysis Summer School Practice Joint Institute
- Slides: 9
Neutron Activation Analysis Summer School Practice Joint Institute for Nuclear Research in Dubna Prepared by: Mohapi Thebe(UWC & Necsa. SA) Supervisor: Prof. M. V. Frontasyeva(JINR-RU) 1
Layout ü Definition: NAA ü Methodology and some practical work ü Introduction to NAA lab at FLNP üDiscuss-Analytical Investigations At IBR-2 M Reactor 2
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. • 3 Types of NAA : ENAA, INAA
Introduction(Con’t) • Fast or fission neutrons (E~100 ke. V-25 Me. V) • Epithermal neutrons (E~0. 5 e. V-100 ke. V) • Thermal neutrons (E~0. 025 e. V) 4
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 5
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" 6 IBR-2 Pulsed Reactor
Experimental room inside the reactor’s building Samples Types of containers 7
ANALYTICAL INVESTIGATIONS AT IBR-2 M REACTOR Instrumental neutron activation analysis INAA Epithermal neutron activation analysis ENAA Material Science Life Sciences · Biomonitoring of atmospheric deposition of heavy metals and other elements (Project REGATA) · Biotechnologies: development of new pharmaceuticals and cleaning the environemnt from toxic elements (biosorption) · · 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 8 Cyclic neutron activation analysis CNAA 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.
? Thanks For Your Attention 9
