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INSTRUMENTAN NEUTRON ACTIVATION ANALYSIS (INAA) FRANK LABORATORY OF NEUTRON PHYSICS SUMMER PRACTICE, 05-23 September 2011 JINR-DUBNA. Prepared by: - PowerPoint PPT Presentation

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  • Prepared by: Tshepo Motimedi (NWU), Happy Vilakazi (UJ), Kefilwe Thoane (NWU), Ntombizikhona. B Ndlovu (SU), Darya Adamchyk(BLR), Tatsiana Lapatsentava(BLR), Alexandr Petrov (BLR), Elena Govor (BLR)

    Supervisor: Prof M. V. Frontasyeva. (FLNP)

  • ContentsIntroduction.INAA TechniqueSample PreparationsAnalytical Technique and practical's-SpectroscopySummary Applications of INAAReferences

  • Founder of FLNPIlja Mikhailovich Frank (1908-1990)

    The Nobel Prize winner in Physics

    FRANK LABORATORY OF NEUTRON PHYSICSJOINT INSTITUTE FOR NUCLEAR RESEARCH1956

  • IntroductionNeutron Activation Analysis (NAA) is a sensitive multi-element analytical technique used for both qualitative and quantitative analysis of major, minor, trace and rare elementsNAA was discovered in 1936 by G. Hevesy (Hungary) and H. Levi (Denmark)

  • Method for NAADestructive (Radiochemical), the elements of the resulting radioactive sample undergoes decomposition and chemical separation process.Non Destructive (Instrumental), chemical separation is not performed, and therefore the resulting radioactive sample is not decomposed to elemental fragments.

  • NAA Principle

  • Neutron sourceIBR-2 Pulsed Fast Reactor

  • INAA Procedure..*Sample preparationNeutron irradiation of samplesDecay of radioactivityDecay periods between15s 7 daysMeasurement of -ray spectra of samples and standards with HPGe-detectorEvaluation of the -ray spectra using a computer program Calculation of element content giving results in g/gDecay timeCount time

  • Sample preparation

  • Sample preparation

  • Samples

    Al encapsulation, long irradiation

    Encapsulation in special designed bags, short irradiation

  • Neutron flux spectrum

  • X-section of Cd-113*Cd cut-off

  • - SpectroscopyDetector Detector Calibration

  • Summary

  • Applications of INAA at IBR-2 Life SciencesMaterial SciencesBiotechnologies: development of new pharmaceuticals, cleaning the environment from toxic elements (biosorption) and synthesis of nanoparticles NAA for the technological process of synthesis of diamonds and NB (boron nitride)

    Analysis of archaeological and museum objects from Russian and other countries

    NAA for decommissioning of Nuclear Power Plants and utilization of industrial wastes 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 of SA)

    Assessment of different ecosystems and their impact on human health

  • ConclusionNeutron Activation Analysis (NAA) is a useful method for the simultaneous determination of major, minor and trace elements of geological, environmental and biological samples in ppb-ppm range with or without chemical separation.

  • ReferenceP. Bode: Instrumental and organizational aspects of a neutron activation analysis laboratotyhttp://www.sciner.com/Neutron/naa.htmlhttp://reactor.engr.wisc.edu/naa/http://tin.er.usgs.gov/geochem/doc/inaa.htmhttp://reactor.engr.wisc.edu/naa/UWNRNAA.htmhttp://www.reak.bme.hu/Wigner_Course/WignerManuals/Budapest/NEUTRON_ACTIVATION_ANALYSIS.htmhttp://archaeometry.missouri.edu/naa_overview.html

  • Dream Team

  • Spasibo!