Time Resolution Studies of Thallium Based Cherenkov Semiconductors

In the context of improving detector performance time-of-flight positron emission tomography (TOF-PET), combination charge induction readout and prompt Cherenkov photon production in semiconductor materials can lead to an outstanding energy, timing, spatial resolution. Energy resolutions as good 1.2% at 662 keV 5% 122 are reported for pixel thallium bromide (TlBr) detectors. The high refractive index Tl-based materials, between 2.3 2.6, leads a generation yield but also challenge extraction, potentially affecting time performance. this work, timing properties TlBr chloride (TlCl) crystals different geometries measured using optimized test setup with high-frequency electronics. A coincidence resolution (CTR) value 167 ± 6 ps FWHM is achieved 3 × mm black-painted crystal. order assess potential improvements, Geant4-based simulation tool kit developed validated against experimental measurements. used predict contributions limiting regarding crystal photodetector properties, highlighting such materials. Finally, paths further improve TOF-PET discussed.