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Neutron Activation Analysis for Life Sciences
Joint Institute for Nucear Research, Dubna, Russia Summer school 6 – 26 7 2015 Summer school 6. – 26. 7. 2015
SLIDE 2 P j t ti i t Project participants
2 Iustinian Mihail Focsa, Unive rsity o f Buc hare st, RO Milan Žák Cze c h T e c hnic al Unive rsity Prague CZ Milan Žák, Cze c h T e c hnic al Unive rsity, Prague , CZ Jiří Janda, Unive rsity o f De fe nc e , Brno , CZ Lucie Fišerová Unive rsity o f De fe nc e Brno CZ Lucie Fišerová, Unive rsity o f De fe nc e , Brno , CZ Zuzana Fedičová, VŠB – T e c hnic al Unive rsity, Ostrava, CZ Veselina Georgieva Plo vdiv Unive rsity Paisii Hile ndarski BG Veselina Georgieva, Plo vdiv Unive rsity Paisii Hile ndarski, BG Project supervisor: Prof Marina V Frontasyeva Project supervisor:
- Prof. Marina V. Frontasyeva
Laboratory: Frank Laboratory of Neutron Physics
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Ai f th j t Aim of the project
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Theoretical lectures focused on neutron physics Reactor shutdown =>
Basic methods of sample preparation and packing
Mosses, grass, corals
Spectra evaluation of preirradiated samples
Genie 2000 (Canberra, USA)
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C t t f t ti Content of presentation
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NAA introduction Types of NAA Technique procedure
Sampling Sa p g Sample preparation Irradiation Irradiation Measurement Spectra processing and evaluation Spectra processing and evaluation Interpretation
Summary Summary
SLIDE 5 NAA I t d ti NAA - Introduction
5 isotope specific analytical technique for the lit ti d tit ti d t i ti f qualitative and quantitative determination
elemental content conversion of stable atomic nuclei into radioactive conversion of stable atomic nuclei into radioactive nuclei by irradiation with neutrons and the subsequent detection
the gamma radiation emitted during the decay of these radioactive emitted during the decay of these radioactive nuclei
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T f NAA
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Types of NAA
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Instrumental NAA (non-destructive), large sample NAA
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Radiochemical NAA (destructive), re quire s sample pre paratio n
SLIDE 9 Biomonitoring Biomonitoring UNECE ICP UNECE ICP Vegetation Vegetation Environment Environment
Bio Bio-
nano
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Environment Environment
technology technology
Life Life
Geology Geology Medicinal Medicinal
Sciences Sciences
Geology Geology plants plants Cosmos Food Food Cosmos Antropology Antropology products products
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T h i d Technique procedure
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1. Sampling (collecting, tagging, bagging) 2. Sample preparation (drying, dissolving, crushing, moulding, etc.) 3. Irradiation (IBR 2) 4. Measurement (REGATA) 4. Measurement (REGATA) 5. Spectra analysis, interpretation
SLIDE 15 3 I di ti t IBR 2
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Transport capsules for irradiation irradiation
Ch1-Ch4 –irradiation channels, S- intermediate storage, DCV- directional control valves, L- loading unit, RCB- radiochemical glove-cell, U- unloading unit, SU- t it SM t i R ki it D d t t CB t l separate unit, SM- storage magazine, R- repacking unit, D- detector, CB- control board, R1-R3- the rooms where the system is located.
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N t Neutron sources
Isotope neutron sources (Cf 252 AmBe PuBe) 16 Isotope neutron sources (Cf-252, AmBe, PuBe) Neutron generators (IREN at JINR) Nuclear and research reactors (IBR 2 LVR 15 in Nuclear and research reactors (IBR-2, LVR-15 in Rez, CZ)
SLIDE 17 4 M t (REGATA)
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SLIDE 18 4 M t (REGATA)
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Summary
Pros: 21 Simultaneous qualitative/quantitative multi- element analysis Mostly non-destructive and relative quick No contamination of workplace and laboratory Minimum need of chemical reagents Cons: Necessity of knowledge of sample matrix Neutron source special regulation, safety rules and radiation protection Dealing with radioactive waste Not all elements can be detected Interferences
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Thank you for your attention!
