Together with development of the detector new scintillating materials of properties desired for digital PET are designed, synthesised and investigated with the aim of developing plastic scintillators with better light output and timing properties than those comercialy available. The novelty of the concept of the J-PET scintillator lies in application of the 2-(4-styrylphenyl)benzoxazole as a wavelength shifter. The substance has not been used as scintillator dopant before. A dopant shifts the scintillation spectrum towards longer wavelengths making it more suitable for applications in long scintillator strips and light detection with digital silicon photomultipliers.
Left and middle: The polymerization of the scintillating mixture in conducted in the furnace. It leads to a scintillating material in the form of a strip. The furnace chamber enables a uniform temperature distribution in the whole volume. Precise temperature control (1°C) and programming the whole temperature cycle are possible as well. Right: The photograph of the J-PET scintillator in UV light. The scintillating material is optically homogeneous and does not contain any defects.
More information can be found in:
- Plastic scintillators for positron emission tomography obtained by the bulk polymerization method;
- PALS investigations of free volumes thermal expansion of J-PET plastic scintillator synthesized in polystyrene matrix;
- Novel scintillating material 2-(4-styrylphenyl)benzoxazole for the fully digital and MRI compatible J-PET tomograph based on plastic scintillators;
- Synthesis and characterization of plastic scintillators for the total-body J-PET scanner;
- Technical attenuation length measurement of plastic scintillator strips for the total-body J-PET scanner;
- Blue-emitting polystyrene scintillators for plastic scintillation dosimetry.