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FRANK LABORTORY OF NEUTRON PHYSICS ION BEAM ANALYSIS

1. Diale Boitshoko Phenyo (UWC) 2. Sefage Amanda (UZ) 3. Nkosi Steven (CSIR) Republic of South Africa Supervisor: A.P. Kobzev (JINR, Dubna ). FRANK LABORTORY OF NEUTRON PHYSICS ION BEAM ANALYSIS. VAN DE GRAAFF ACCELERATOR EG-5. Main Characteristics

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FRANK LABORTORY OF NEUTRON PHYSICS ION BEAM ANALYSIS

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  1. 1. DialeBoitshokoPhenyo (UWC) 2. Sefage Amanda (UZ) 3. Nkosi Steven (CSIR) Republic of South Africa Supervisor: A.P. Kobzev (JINR, Dubna) FRANK LABORTORY OF NEUTRON PHYSICS ION BEAM ANALYSIS JINR Summer Practice 2009

  2. VAN DE GRAAFF ACCELERATOR EG-5 • Main Characteristics • Energy region 0.9-3.5 MeV • Energy spread less than 500eV • Beam intensity 10µA for He and • 30µA for H. • Types of ions used • 4He+ and H+ JINR Summer Practice 2009

  3. ACCELERATOR EG-5 JINR Summer Practice 2009

  4. Rutherford Backscattering Spectrometry (RBS) Elastic Recoil Detection Analysis (ERDA) Particle Induced X-ray Emission (PIXE) ANALYTICAL METHODS JINR Summer Practice 2009

  5. PRINCIPLE OF RBS KINEMATIC FACTOR Atomic mass of target. Z JINR Summer Practice 2009

  6. SCATTERING CROSS SECTION Z1 - Atomic number of incident particle Z2 - atomic number of target M1 – Atomic mass of incident particle M2 – Atomic mass of target Ѳ - Scattering angle JINR Summer Practice 2009

  7. PRINCIPLE OF RBS Stopping cross section E0, Z1, M1 + x N-Number of particles in the layer ΔX θ1 -Energy loss per unit length θ θ2 E1, Z2, M2 Ω Detector JINR Summer Practice 2009

  8. RBS EXPERIMENTAL RESULTS Intensity(arb.) A = σΩ .Q . Nt A – total number of detected particles Q – total no. of inc. Particles Nt – no. of target atoms per unit area Channel number JINR Summer Practice 2009

  9. RBS EXPERIMENTAL RESULTS Channel number JINR Summer Practice 2009

  10. RBS EXPERIMENTAL RESULTS JINR Summer Practice 2009

  11. PRINCIPLE OF ELASTIC RECOIL DETECTION ANALYSIS JINR Summer Practice 2009

  12. ERDA-RESULTS Thickness = 2600E+15 at./cm2 Counts JINR Summer Practice 2009

  13. ERDA – RESULTS cont,d Thickness = 1570E+15 at./cm2 Channel number JINR Summer Practice 2009 Channel number

  14. PRINCIPLE OF PIXE Characteristics X-rays JINR Summer Practice 2009

  15. PRINCIPLE OF PIXE Characteristics X-rays JINR Summer Practice 2009

  16. PRINCIPLE OF PIXE • Moseley law • Rc – Rydberg’s constant • Z – atomic number • Sn – screening constant • n – main quantum number • ν - frequency of X-ray quantum JINR Summer Practice 2009

  17. CALIBRATION JINR Summer Practice 2009

  18. AEROSOL ANALYSIS BY PIXE & RBS JINR Summer Practice 2009

  19. AEROSOL ANALYSIS BY PIXE & RBS JINR Summer Practice 2009

  20. AEROSOL ANALYSIS BY PIXE & RBS JINR Summer Practice 2009

  21. Non-destructive methods ( Different fields i.e. Electronic devices , Multi layer-structures, geologist, archaelogist etc) Determine structure and composition of materials Elemental analysis Elemental concentration, depth profile in thin films ( < 1 at.%) CONCLUSION JINR Summer Practice 2009

  22. CONCLUSION cont.d JINR Summer Practice 2009

  23. Siyabonga JINR Summer Practice 2009

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