학술논문
Further progress in lead tungstate crystals
Document Type
Conference
Author
Source
Proceedings of 1994 IEEE Nuclear Science Symposium - NSS'94 Nuclear science and medical imaging Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record. 1:114-118 vol.1 1994
Subject
Language
Abstract
Recently, lead tungstate PbWO/sub 4/, 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%//spl radic/E/spl oplus/0.7 can already be achieved with a calorimeter prototype of 9 or 20 counter cells (20/spl times/20/spl times/180/spl divide/200 cm/sup 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 PbWO/sub 4/ crystals have been tuned for a better control of stoichiometry, and investigation of pentavalent doping has been explored.ETX