Observation of scattering and absorption centers in lead fluoride crystals

Authors
Citation
P. Achenbach, Observation of scattering and absorption centers in lead fluoride crystals, IEEE NUCL S, 48(1), 2001, pp. 144-149
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Nuclear Emgineering
Journal title
IEEE TRANSACTIONS ON NUCLEAR SCIENCE
ISSN journal
0018-9499 → ACNP
Volume
48
Issue
1
Year of publication
2001
Part
2
Pages
144 - 149
Database
ISI
SICI code
0018-9499(200102)48:1<144:OOSAAC>2.0.ZU;2-K
Abstract
For the first time, lead fluoride is used as a fast and compact material in electromagnetic calorimetry. Excellent optical and mechanical properties o f the pure Cherenkov crystals are necessary for the A4 collaboration to per form a measurement of the nucleon's strange form factors. Visible scatterin g and absorption centers as well as surface damages have been investigated to characterize the quality of more than one thousand crystals. Besides, tr ansmittance measurements have been performed on all crystals to reveal abso rption bands produced by intrinsic or impurity related point-structure defe cts. As a consequence, 89 crystals had to be replaced by the Chinese manufa cturer SICCAS.