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Laboratory of Ion Beam Analysis at NPI V ladimír Hav ránek

Laboratory of Ion Beam Analysis at NPI V ladimír Hav ránek Nuclear Physics Institute ASCR v.v.i, 250 68 Řež u Pra hy, Czech Republic. Presentation outline Facilities - 3.5 MV Van de Graaff accelerator (since 1964) - 3 MV HVEE Tandetron accelerator (since 2005)

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Laboratory of Ion Beam Analysis at NPI V ladimír Hav ránek

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  1. V.Havránek Laboratory of IBA at NPI Laboratory of Ion Beam Analysis at NPI Vladimír Havránek Nuclear Physics Institute ASCR v.v.i, 250 68 Řež u Prahy, Czech Republic

  2. V.Havránek Laboratory of IBA at NPI Presentation outline Facilities - 3.5 MV Van de Graaff accelerator (since 1964) - 3 MV HVEE Tandetron accelerator (since 2005) - Activities at LWR-15 research reactor Analytical Techniques - RBS, PIXE, ERDA, PIGE, PESA, NDP, PGAA - High energy ion implantation - Ion microanalysis Applications - Material research, biology, environment, history and art, modification of materials with energetic ions, etc.

  3. V.Havránek Laboratory of IBA at NPI Our electrostatic accelerators VdG 1964 Tandetron 2005

  4. V.Havránek Laboratory of IBA at NPI Tandetron MC 4130 Accelerator Accelerator RBS, RBS-C, ERDA-TOF Ion implantation PIXE, PIGE Ion microprobe

  5. V.Havránek Laboratory of IBA at NPI Interaction of MeV ions with the sample and corresponding analytical techniques Základní procesy

  6. V.Havránek Laboratory of IBA at NPI Van de Graaff and Tandetron 4130 MC accelerators (H-Au ions with energies 0.4-20 MeV and intensities up to several microamps) Methods and main research fields RBS, RBS-channeling, ERDA, ERDA-TOF Analyses of composition and structure of layered, nano-structured materials, hard coatings, metal- polymer composites, optoelectronics and microelectronics materials, oxidation and corrosion processes, diffusion and migration of atoms in solids, processes of self organization (e.g. metal-carbon allotropes composites) Ion microsonde 3D mapping of composition and structure of materials with lateral resolution of 1 micrometer, study of biological objects ( recently Tycho de Brahe’s hairs), ancient ceramics, minerals. In 2010 first experiments with ion writing PIXE, PIGE Environmental studies, mostly analyses of aerosols and micro-particles accumulated on filters Ion implantation Modification of solids (e.g. improvement of properties of selected microelectronics components), simulations of radiation degradation of materials (e.g. polymers) Devices installed on thermal neutron beam from LWR-15 research reactor Methods and main research fields Neutron depth profiling (NDP) Analyses offew light elements (He, Li, B, N..), study of diffusion processes in solids (e.g. in materials important for nuclear technologies and fusion programs), study of radiation degradation of solids (e.g. polymers), development of polymer based sensors Prompt gamma analysis (PGA) Analyses of composition of materials (e.g. analyses of boron in biological samples for Neutron capture tumor therapy). Method complementary to Neutron activation analysis.

  7. V.Havránek Laboratory of IBA at NPI

  8. V.Havránek Laboratory of IBA at NPI Příklady aplikace metod PIXE a PIGE

  9. TOF-ERDA Start detector The TOF-ERDA spectrometer set into operation in 2006 with support and cooperation of Rossendorf group., The system consist of thin carbon foil start detector and particle energy detector, which also provides the stop time signal. In the near future the second stop detector will be add. Example of TOF-ERDA spectrometer tests. Spectra of LiF (200 nm) deposited on glassy carbon. 15,4 MeV Cu6+ (Tv =2,2 MV) V.Havránek Laboratory of IBA at NPI

  10. V.Havránek Laboratory of IBA at NPI RBS-Channeling The RBS-Channelling setup is only equipment which was fully supplied by external vendor. It was bought from NEC company USA and recently installed at -30 deg. beam line. The target chamber is equipped with fine goniometer with five degrees of freedom (x,y,z,,) and two charge particle detectors. Test experiments are now in progress. There is also a possibility to add additional x or -ray detector, so the PIXE or PIGE channelling experiments can be performed in future. The setup will be used for routine RBS-channelling and RBS measurements. Channeling software

  11. Ion microbeam (since 2009) V.Havránek Laboratory of IBA at NPI 1000 Cu mesh Th inclusion 25x25m

  12. V.Havránek Laboratory of IBA at NPI Microbeam target chamber STIM RBS Microscope PIXE Far. cup

  13. V.Havránek Laboratory of IBA at NPI Two Examples of Cobalt Blue Sherds found in the Excavated Sediments from the Pool of the Royal Palace in Angkor Thom. The sherds were first irradiated with protons frontally (Van de Graaff Generator) and transversally (Microbeam) of medium thin (~2 mm) slices cut from the original pieces.

  14. V.Havránek Laboratory of IBA at NPI Elemental distribution maps 500x500 um K K Ca Ti Co Si Fe

  15. V.Havránek Laboratory of IBA at NPI Comparison of Spatial Distributions for Co, Fe and Ca

  16. Co As V.Havránek Laboratory of IBA at NPI Cobalt inclusion – detail (maps 25x25 um for Fe, Co and As) GUPIX fit of a cobalt inclusion defined as a region of interest Elemental ratios As/Co 0.006 (0.6%) Fe/Co 0.017 (1.7%)

  17. EXAMPLES OF A SAMPLES HOLDER WITH MOUNTED CEREBELLUM BRAIN SLICES AND LIGHT MICROSCOPE IMAGES THEREOF A LIGHT MICROSCOPE IMAGE OF THE CENTRAL PART OF THE CEREBELLUM SECTION SCANNED WITH THE PROTON BEAM. SPATIAL WINDOW CONTAING A BRAIN SAMPLE IRRADIATED WITH PROTON BEAM SAMPLE HOLDER WITH MOUNTED BRAIN SLICES V.Havránek Laboratory of IBA at NPI

  18. V.Havránek Laboratory of IBA at NPI S Cu Ca Ni Fe Zn

  19. V.Havránek Laboratory of IBA at NPI Oxidation of zirconium

  20. V.Havránek Laboratory of IBA at NPI 1.8 MeV protons ) Zr RBS 18O a 18O b Si Fe Zr PIXE 18O b 18O a

  21. EXAMPLES OF A SAMPLES HOLDER WITH MOUNTED CEREBELLUM BRAIN SLICES AND LIGHT MICROSCOPE IMAGES THEREOF A LIGHT MICROSCOPE IMAGE OF THE CENTRAL PART OF THE CEREBELLUM SECTION SCANNED WITH THE PROTON BEAM. SPATIAL WINDOW CONTAING A BRAIN SAMPLE IRRADIATED WITH PROTON BEAM SAMPLE HOLDER WITH MOUNTED BRAIN SLICES V.Havránek Laboratory of IBA at NPI Ion beam writing (hammering) using 10-12 MeV focused beam of C, O a Si into layer of PDMS (Polydimethylsiloxane) In cooperation with Dr. Istvan Rajta,Atomki Debrecen, HAS

  22. V.Havránek Laboratory of IBA at NPI LVR-15 nuclear reactor REZ RESEARCH REACTOR LVR-15 LVR-15 IS LIGHT-WATER MODERATED AND COOLED TANK NUCLEAR REACTOR WITH FORCE COOLING. THE FUEL IRT-2M IS ENRICHED TO 36%, COMBINED WATER-BERYLLIUM REFLECTOR IS USED. MAIN CHARACTERISTICS: Maximum reactor power 10 MW Maximum thermal neutron flux in the core 1.5 x 1018 n/m2s Maximum fast neutron flux in the core 3 x 1018 n/m2s Thermal neutron flux at the end of the beam tube 1 x 1013 n/m2s Thermal neutron flux in irradiation channel in fuel 1.2 x 1018 n/m2 Thermal neutron flux in irradiation channel in reflector 9 x 1017 n/m2s LVR15 HCH-3 neutron guide

  23. V.Havránek Laboratory of IBA at NPI Thermal neutron guide tube and TNDP chambers TNDP CHAMBERS HCH-3 neutron guide LVR-15 reactor hall

  24. Nuclear reaction Nuclide Natural abundance or activity* [at/mCi] Cross section [barn] Energy of reaction products [keV] Detection limit [at/cm2] 0.00013 3.1 x 1013 3He 3He(n,p)3H 191 5326 573 7.42 2734 940 1.8 x 1014 6Li(n,a)3H 6Li 2051 2.5 x 1014 1438 3.5 x 1012 7Be* 7Be(n,p)7Li 48000 207 10B(n,ga)7Li 10B 4.3 x 1013 19.6 3606 839 1471 10B(n,a)7Li 230 19.6 10B 1775 6.7 x 1014 1014 1.81 14N(n,p)14C 42 9.1 x 1016 14N 99.64 584 4.4 x 1015 22Na(n,p)22Ne 31000 103 4.7 x 1012 2247 22Na* 0.76 412 33S 3091 33S(n,a)30Si 1.2 x 1018 0.14 35Cl 75.5 0.49 598 35Cl(n,p)35S 17 3.4 x1017 1.4 x1016 59Ni(n,a)56Fe 59Ni* 12.3 4757 340 1.3 x 1020 V.Havránek Laboratory of IBA at NPI List of the NDP relevant isotopes Basic reaction characteristics of the NDP relevant isotopes, and detection sensitivities for the NDP single-detector spectro- meter in the NPI Rez. Detection limits are based on the charged particle counting rate 0.01 s-1, detector -sample solid angle 0.03 Sr, and intensity of the neutron beam Fth = 107 cm-2s-1.

  25. V.Havránek Laboratory of IBA at NPI Principles od NDP (Neutron Depth Profiling)

  26. Principal scheme of the detector-target-detector coincidence set-up V.Havránek Laboratory of IBA at NPI Coincidence NDP

  27. PGAA (Prompt Gamma Activation Analysis) facility Instrument parameters Installed at LVR-15 reactor Neutron flux 3x106 n cm-2s-1 Beam 25x7 mm2 Detector HPGe (25%) Sampleliquid/powder in 0.5 ml teflon vial Sensitivity 3.7 counts/s /mg 10B Det. limits~ 0.1 mg(B,Sm,Gd) ~ 50 mg (H) • Usage: Analytical method PGAA • - concentration of isotopes/elements (B, Cd,Sm,Gd, H, Cl, …) • - optimized for liquid (powder) samples • biological samples (study of pharmacokinetics of boron compounds in the framework of BNCT) • minerals

  28. V.Havránek Laboratory of IBA at NPI Thank you for your attention ! Dekuji za pozornost !

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