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SA Summer Student Practice NAA at the Reactor IBR-2

Joint Institute for Nuclear Research in Dubna. FRANK LABORATORY OF NEUTRON PHYSICS. SA Summer Student Practice NAA at the Reactor IBR-2. P repared by : Rwexwana A. Mudau L. Mbolekwa B. N. P racti c e supervisor: Dr. M. V. Frontasyeva. Introduction.

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SA Summer Student Practice NAA at the Reactor IBR-2

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  1. Joint Institute for Nuclear Research in Dubna FRANK LABORATORY OF NEUTRON PHYSICS SA Summer Student Practice NAA at the Reactor IBR-2 Prepared by: Rwexwana A. Mudau L. Mbolekwa B.N. Practice supervisor: Dr. M. V. Frontasyeva

  2. Introduction FRANK LABORATORY OF NEUTRON PHYSICS JOINT INSTITUTE FOR NUCLEAR RESEARCH 1956 Ilґja Mikhailovich Frank (1908-1990) The Nobel Prize winner in Physics

  3. Neutron activation analysis is a qualitative and quantitative method for the determination of elements based upon the conversion of stable nuclei to radioactive nuclei via nuclear reactions, and measurement of the reaction products

  4. Objectives • To learn the basics and applications of Neutron Activation Analysis (NAA) • To get acquainted with NAA instrumentation at the pulsed fast reactor IBR-2

  5. IBR-2 Pulsed Fast Reactor REGATA

  6. NAA

  7. Advantages of NAA • This technique is non-destructive and provides multi-element analysis • The amount of the element to be analyzed is usually a part per million (ppm) and sometimes a part per billion (ppb) or even better

  8. Limitations of NAA • It does not give any information about the chemical form in which a particular element is present • Neutron activation analysis requires the use of large irradiation machines • Another drawback is the long time required for some analyses where long-lived radionuclides are involved

  9. Procedures of NAA Sampling Sample preparation Irradiation Unpacking Preparationof measuring Measurement Calculationof results Critical valuationofresults

  10. Preparation of vegetation samples for NAA

  11. Boxes for re-packing samples after irradiation Types of containers:

  12. For calibration Eu-152 was used as a gamma source

  13. Conclusion • Neutron Activation Analysis (NAA) is a useful method for the simultaneous determination of major, minor and trace elements of life and material science samples in ppb-ppm range with or without chemical separation

  14. Applications

  15. Thank you for your attention Спасибо!

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