FAZIACCB, S.Barlini, M.Ciemala

Test of CsI(Tl) scintillator detectors with protons at the Bronowice Cyclotron Center (CCB)

November 10, 2017
1 min read

(FAZIA Collaboration)

For our measurements, we plan to use the mono-energetic proton beams from the CCB facility at energies ranging from 70 MeV up to 200 MeV, with an energy resolution of \uf07e0.7% FWHM as already performed for other experiments [6]. To decrease the energy in the range (20-30 MeV) where the CsI(Tl) proton calibration energy is more critical, a passive layer of Cu will be put in front of our detectors. Using SRIM calculation, it is possible to calculate the thickness of the absorber and the straggling on the energy distribution created in the crossing of the absorber. For example, starting from a 70 MeV proton beam, after 0.56 cm of nat Cu, the protonenergy is 29.04 MeV, with a straggling of around 1 MeV (sigma). So, considering that our crystals have a resolution around 3-5% (estimated with alpha source), the straggling effect should not affect too much our measurement. In this way we will cover all the proton energy range, from 20-30 MeV up to the maximum that our CsI(Tl) detectors can stop inside due their length (115 MeV for the GARFIELD crystal which are \uf07e4cm and 198 MeV for the 10 cm FAZIA crystals).