DocumentCode
1390422
Title
Detection of monochromatic photons between 50 and 790 MeV with a PbWO4-scintillator array
Author
Menge, K. ; Novotny, R. ; Beck, R. ; Doring, W. ; Metag, V. ; Stroher, H.
Author_Institution
II. Phys. Inst., Giessen Univ., Germany
Volume
45
Issue
3
fYear
1998
fDate
6/1/1998 12:00:00 AM
Firstpage
681
Lastpage
685
Abstract
The performance of PbWO4 as a fast and compact scintillator material for calorimetry at energies well below 1 GeV has been investigated using a collimated beam of monoenergetic photons with an energy between 50 and 790 MeV provided by the tagged photon facility of MAMI at Mainz. In continuation of previous experiments with electrons, a larger matrix of 5×5 PbWO4-crystals (20×20×150-200 mm3) has been used to reconstruct the electromagnetic shower. The scintillators were selected according to their optical quality and response to low energy γ-sources. The array was operated at a stabilized temperature of T=8°C and read-out individually by photomultiplier tubes. The achieved excellent energy resolution amounts to σ/E=1.54%/√E+0.30% (E given in GeV) and has proven the applicability of PbWO4 as a high quality scintillator material even at medium energies. The experimental data have been reproduced by GEANT3 simulations
Keywords
gamma-ray detection; lead compounds; solid scintillation detectors; 50 to 790 MeV; GEANT3 simulations; PbWO4; PbWO4-scintillator array; electromagnetic shower; high quality scintillator material; low energy γ-sources; monochromatic photons; monoenergetic photons; optical quality; photomultiplier tubes; read-out; scintillators; stabilized temperature; tagged photon facility; Containers; Crystals; Electromagnetic measurements; Electrons; Energy resolution; Photomultipliers; Physics; Radiation detectors; Sections; Temperature;
fLanguage
English
Journal_Title
Nuclear Science, IEEE Transactions on
Publisher
ieee
ISSN
0018-9499
Type
jour
DOI
10.1109/23.682612
Filename
682612
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