Charged particle detection with PbWO/sub 4/

The response of PbWO/sub 4/ to high-energy protons has been investigated in two test experiments at the proton beam facilities COSY and AGOR. The determined energy resolution below 360 MeV of /spl sigma//E = 0.97%/E/sub /spl gamma///sup 1/2/ + 3.33% is comparable to the previously deduced photon response. Energy spectra of inelastically scattered protons below 85 MeV are compared to similar distributions obtained for BaF/sub 2-/ and CeF/sub 3-/ detectors, respectively. The comparison to the response of charged pions indicates a strong quenching effect of the scintillation light for hydrogen isotopes.