Novel scintillating material 2-(4-styrylphenyl)benzoxazole for the fully digital and MRI compatible J-PET tomograph based on plastic scintillators
Fig 7
Charge spectra measured with the J-PET and BC-420 scintillator.
PM1, PM2, PM3, PM4 used in the legend denote photomultipliers indicated in Fig 3. In the left side charge spectra of the J-PET scintillator (0.05J-PET or 0.5J-PET) measured with photomultipliers PM1 and PM2 are compared to the spectra of BC-420 scintillator measured with the same pair of photomultipliers. The number in the name of the J-PET scintillator indicates the concentration of WLS in ‰. In the right side spectra of the J-PET scintillators are compared to spectra of BC-420 measured with the same pair of photomultipliers: PM3 and PM4. The difference between the spectra for the low values of charge are due to the fact that PM1 and PM3 were used in the trigger. The differences at large charge (at the Compton edge) are due to the differences in the light yield.