In the course of the construction of a new type of time-of-flight positron emission tomograph (TOF PET), the time resolution of a system with BaF2 crystals has been tested. It was found that low-viscosity silicon oil is one of the best optical coupling media between the BaF2 crystal and the photomultiplier tube, and that the time resolution is less sensitive to the geometry between the detector and the source position. The dependence of the time resolution on the size of the BaF2 crystal has been determined as well. Absorption and attenuation of photons in the detector system are expected to be of particular importance for the better performance of the TOF PET.
ASJC Scopus subject areas
- Nuclear and High Energy Physics