prepared by: mohapi thebe(uwc & necsa-sa) supervisor: p rof. m. v. frontasyeva (jinr-ru)
DESCRIPTION
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 - PowerPoint PPT PresentationTRANSCRIPT
Prepared by: Mohapi Thebe(UWC & Necsa-SA)
Supervisor: Prof. M. V. Frontasyeva(JINR-RU)
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Neutron Activation Analysis
Summer School PracticeJoint Institute for Nuclear
Research in Dubna
Layout
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Definition: NAA Methodology and some practical work Introduction to NAA lab at FLNPDiscuss-Analytical Investigations At IBR-2M Reactor
Introduction
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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)
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•Fast or fission neutrons (E~100 keV-25 MeV)•Epithermal neutrons (E~0.5 eV-100keV)•Thermal neutrons (E~0.025 eV)
mnmg
abs
scabstot
nnnn
nnnnnpnn
),(...),(),(),(
)',()2,(),(),(),(
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Procedure in NAA
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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 PHYSICSJOINT INSTITUTE FOR NUCLEAR RESEARCH
1956Ilґja Mikhailovich Frank (1908-1990)The Nobel Prize in Physics 1958"for the discovery and the interpretation of the Cherenkov effect"
IBR-2 Pulsed Reactor6
Samples
Types of containers
Experimental room inside the reactor’s building
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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
Cyclicneutron activation
analysisCNAA
Epithermalneutron activation
analysis
ENAA
Life Sciences Material Science
ANALYTICAL INVESTIGATIONS AT IBR-2M ANALYTICAL INVESTIGATIONS AT IBR-2M REACTORREACTOR
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?Thanks For Your Attention
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