Title :
Further progress in lead tungstate crystals
Author :
Fyodorov, A. ; Korzhik, M. ; Missevitch ; Pavlenko, V. ; Kachanov, V. ; Singovsky, A. ; Annenkov, A.N. ; Ligun, V.A. ; Peigneux, J.-P. ; Vialle, J.P. ; Faure, J.-L. ; Binon, F.
Author_Institution :
Inst. of Nucl. Problems, Byelorussian State Univ., Minsk, Byelorussia
fDate :
30 Oct-5 Nov 1994
Abstract :
Recently, lead tungstate PbWO4, also called PWO crystals, have been considered as a promising material for precise electromagnetic calorimetry and the first tests have shown that energy resolution, with photomultiplier readout, better than 3%/√E⊕0.7 can already be achieved with a calorimeter prototype of 9 or 20 counter cells (20×20×180÷200 cm 3). Among the relevant properties of the crystal, its good radiation hardness has been specially mentioned as well as its short radiation length and its emission in the blue range of the spectrum. Further development in PWO technology to improve the transparency and uniformity of long crystals suitable for calorimetry has been undertaken. The usual growing conditions for normal PbWO4 crystals have been tuned for a better control of stoichiometry, and investigation of pentavalent doping has been explored
Keywords :
electron beam effects; gamma-ray effects; lead compounds; niobium; photoluminescence; solid scintillation detectors; tungsten compounds; PWO crystals; PbWO4; PbWO4:Nb; electromagnetic calorimetry; energy resolution; pentavalent doping; photomultiplier readout; radiation hardness; stoichiometry; Calorimetry; Crystalline materials; Crystals; Electromagnetic radiation; Energy resolution; Lead; Materials testing; Photomultipliers; Prototypes; Radiation detectors;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474379
