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Principles of Spectrometry

Principles of Spectrometry. Principles of Spectrometry. What is this?. Principles of Spectrometry. Deconvolution. Principles of Spectrometry. Energy and efficiency calibration. Principles of Spectrometry. Select events. Compton suppression. “Anti-coincidences”.

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Principles of Spectrometry

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  1. Principles of Spectrometry Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  2. Principles of Spectrometry What is this? Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  3. Principles of Spectrometry Deconvolution. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  4. Principles of Spectrometry Energy and efficiency calibration. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  5. Principles of Spectrometry Select events. Compton suppression. “Anti-coincidences”. What if cascades are present? ► Coincidences. By software or by hardware. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  6. Advanced background reduction Cascade selection Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  7. Principles of Spectrometry Compton spectrometer. Another example for coincidences. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  8. Principles of Spectrometry • Peak area determination. • Peak-to-total ratio. • Peak-to-Compton ratio. • Relative efficiency. • Intrinsic efficiency. • Absolute efficiency. • Total efficiency. • Solid angle. • Energy Resolution (effect of number of charge carriers). • Dead time. • Resolving time. • Anti-coincidences. • Coincidences. • Summation effects and true coincidences. • Random coincidences. • Attenuation coefficient. • Mass attenuation coefficient. • Mean-free path. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  9. Principles of Spectrometry Mass thickness Linear attenuation coefficient  = t (photoelectric) + s(Compton) + k (pair production) Mass attenuation coefficient is independent of density and physical state. HW 7 Mean free path Compounds and mixtures?? Give examples. Refer to XCOM. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  10. Principles of Spectrometry Photon Attenuation Not realistic…!! Valid for parallel photon paths or far geometries. Self-Absorption HW 8 Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  11. Principles of Spectrometry Solutions to self absorption at close geometries? MC Isotropic Photon Emission Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  12. Principles of Spectrometry Geometric correction factor THINKING QUIZ Detector Point Source Detector Extended Source Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  13. Detector spheres for accelerators • Cost • Room • Availability • Passive Shielding Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  14. An experimental setup for accelerators 1 2 3 4 R 1.27 Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  15. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  16. An experimental setup for accelerators Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  17. An experimental setup for accelerators Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  18. An experimental setup for accelerators Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  19. An experimental setup for accelerators Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  20. An experimental setup for accelerators Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  21. An experimental setup for accelerators • Low-energy ultra-weak resonance. • 10 days beam on target. Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

  22. An experimental setup for accelerators Accelerator Physics, JU, First Semester, 2010-2011 (Saed Dababneh).

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