1 / 24

Tests of scintillators

Tests of scintillators. CsI, CsI(Na), BGO, NaI(Tl). CsI(Tl). CsI(Na). 15 x 15 mm. 9 x 9 mm. 170 mm. Full absorption. CsI(Na) scintillator with 2 PMT readout. Measurement without collimation 137 Cs, 661 keV. Energy of PMT 2 (big window). Energy of PMT 1 (small window). Ratio (position).

beau-randall
Download Presentation

Tests of scintillators

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Tests of scintillators CsI, CsI(Na), BGO, NaI(Tl) CsI(Tl)

  2. CsI(Na) 15 x 15 mm 9 x 9 mm 170 mm

  3. Full absorption CsI(Na) scintillator with 2 PMT readout Measurement without collimation 137Cs, 661 keV Energy of PMT 2 (big window) Energy of PMT 1 (small window)

  4. Ratio (position) Sum (energy) CsI(Na) measured with a collimated source Energy of PMT 2 (big window) Energy of PMT 1 (small window)

  5. Energy spectrum (sum of 2 PMT’s energies) Energy resolution 9.6% at 661 keV Constant for the position of the interaction Sum of 2 PMTs energies

  6. Position resolution (ratio of the PMT’s energies) 5 cm 10 cm 15 cm Light division between 2 PMTs

  7. Position resolution

  8. Position resolution Position resolution 1.5 – 3 cm

  9. Mean absorption distance

  10. Readout with one PMT 15 cm 10 cm 5 cm

  11. CsI, pure

  12. Energy resolution Resolution 17 – 19 % Sum energy

  13. Position resolution 5 cm 10 cm 15 cm Light division between 2 PMTs

  14. Position resolution

  15. Position resolution Position resolution 2 – 8 cm

  16. BGO

  17. BGO scintillator with 2 PMT readout Scintillator was illuminated by Cs137 source (661 keV) without a collimator Strong nonuniformity of light yield along the crystal distance Energy of PMT 2 (big window) Energy of PMT 1 (small window)

  18. BGO collimated measurement Full absorption

  19. BGO collimated measurement Full absorption

  20. BGO results • Light yield is strongly non uniform along the crystal distance • Light separates always in the same proportion between left and right sides • Energy resolution • ≈18% (big window) ÷ 24% (small window)

  21. CsI(Tl) 7% at 661 keV 2.5 cm 2.5 cm

  22. to continue with..

More Related