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

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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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