Title of article
Thermal annealing and optical darkening effects in CsI(Tl) crystals
Author/Authors
Chowdhury، نويسنده , , M.A.H. and Imrie، نويسنده , , D.C.، نويسنده ,
Pages
9
From page
138
To page
146
Abstract
The effects of thermal annealing and optical darkening on Φ2.54×2.54 cm2 CsI(Tl) crystals damaged by exposure to 60Co gamma radiation and on unirradiated crystals have been studied. Thermal annealing can restore radiation-damaged crystals to their unirradiated state and can even improve the scintillation performance of unirradiated crystals. Optical darkening of crystals with an intense UV source leads to the production of a number of bands in the absorption spectra of crystals, which may be removed by isochronal annealing.
Keywords
CsI(Tl) crystals , Optical darkening , colour centres , Radiation damage , Scintillation and optical properties , Thermal annealing
Journal title
Astroparticle Physics
Record number
2009650
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