Thermal annealing and optical darkening effects in CsI(Tl) crystals

Authors
Chowdhury, MAH Imrie, DC
Citation
Mah. Chowdhury et Dc. Imrie, Thermal annealing and optical darkening effects in CsI(Tl) crystals, NUCL INST A, 432(1), 1999, pp. 138-146
Citations number
11
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences","Instrumentation & Measurement
Journal title
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
ISSN journal
01689002 → ACNP
Volume
432
Issue
1
Year of publication
1999
Pages
138 - 146
Database
ISI
SICI code
0168-9002(19990801)432:1<138:TAAODE>2.0.ZU;2-Y
Abstract
The effects of thermal annealing and optical darkening on Phi 2.54 x 2.54 c m(2) CsI(TI) crystals damaged by exposure to Co-60 gamma radiation and on u nirradiated crystals have been studied. Thermal annealing can restore radia tion-damaged crystals to their unirradiated state and can even improve the scintillation performance of unirradiated crystals. Optical darkening of cr ystals with an intense UV source leads to the production of a number of ban ds in the absorption spectra of crystals, which may be removed by isochrona l annealing. (C) 1999 Elsevier Science B.V. All rights reserved.