SCINTILLATORS FOR PHOTON DETECTION AT MEDIUM ENERGIES
In a comparative study the performance of sub-arrays consisting of large CeF3 and PbWO4 crystals has been investigated with high energy photons below 1GeV. Energy and time resolutions are determined and compared to the corresponding values for BaF2 based on the experience of operating the electromagnetic calorimeter TAPS. Since clean photon detection relies on the discrimination and identification of charged and neutral particles, the response to hadrons including time-of-flight and pulse-shape techniques are discussed in detail.