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HK: Physik der Hadronen und Kerne

HK 48: Instrumentation and Applications VI

HK 48.5: Vortrag

Donnerstag, 14. März 2002, 17:15–17:30, F

Charged Particle Detection with PbWO₄ — •Matthias Hoek¹, Werner Döring¹, Volker Hejny², Herbert Löhner³, Volker Metag¹, Rainer Novotny¹, and Heinrich Wörtche³ — ¹II. Physikalisches Institut, Universität Giessen, Germany — ²Institut für Kernphysik, FZ-Jülich, Germany — ³Kernfysich Versneller Instituut, Groningen, The Netherlands

The response of PbWO₄ to high energy charged hadrons has been investigated in two test experiments at the proton beam facilities COSY, FZ-Jülich (E=1.2 GeV) and AGOR, KVI, Groningen (E=85MeV). For the first time, the energy resolution for protons and deuterons below 360 MeV energy, which were stopped within 150 mm of PbWO₄, has been determined to σ/E=0.97%/√E + 3.33%. The result is comparable to the previously deduced photon response. Energy spectra of inelastically scattered protons below 85MeV measured with pure and doped PbWO₄-crystals are compared to similar distributions obtained for BaF₂- and CeF₃-detectors. The comparison to the response of charged pions indicates a strong quenching factor (>3) of the scintillation light for hydrogen isotopes. The obtained results document the applicability of PbWO₄ in photon and particle detection at medium energies.