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Fabrication and Properties of Translucent SrI _2 and Eu:SrI _2 Scintillator Ceramics

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5 Author(s)
Podowitz, Stephen R. ; Dept. of Mater. Sci. & Eng., Stanford Univ., Stanford, CA, USA ; Gaume, R.M. ; Hong, W.T. ; Laouar, A.
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Preparation of SrI2 and Eu:SrI2 ceramics is reported on for the first time. Translucent ceramics were sintered by hot-pressing. Thermal analysis on SrI2 and EuI2 starting powders was used to identify dehydration temperatures and informed the choice of sintering conditions. Optical transmission was found to decrease with increasing temperature and time. Microstructure studies (grain size and texture) were used to evaluate variations in optical transmission between samples. Scintillation characterization was carried out on 5 wt% Eu:SrI2 ceramics. X-ray radio-luminescence spectra showed both the characteristic Eu2+ emission band and a lower-intensity, broad emission in the visible. Scintillation lifetimes were shorter than those previously reported for single-crystal samples, and afterglow was substantially lower. A light yield of 21 000 ph/MeV was calculated from the photopeaks under γ-irradiation. Like single-crystal samples, Eu:SrI2 ceramics were found to have a very proportional response with γ -ray energy.

Published in:

Nuclear Science, IEEE Transactions on  (Volume:57 ,  Issue: 6 )

Date of Publication:

Dec. 2010

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