Affiliation:
1. National Academy of Sciences of RA Institute for Physical Research Ashtarak 0203 Armenia
2. Universite Claude Bernard Lyon1 Institut Lumière Matière UMR 5306 CNRS 10 rue Ada Byron 69622 Villeurbanne France
3. Institut universitaire de France (IUF) 1 rue Descartes 75231 Paris Cedex 05 France
Abstract
Gadolinium scandium aluminum garnet scintillator crystals (GSAG:Ce) with Ca2+, Mg2+, and Li+ co‐dopants are grown by the Bridgman method under reducing atmosphere. Crystals are irradiated with a 60Co gamma‐ray source to 10 kGy and 50 kGy doses for evaluation of the radiation hardness. A wide absorption band peaking at around 620 nm is observed in all as‐grown uncodoped GSAG:Ce crystals. Air annealing at high temperatures and introduction of codopants result in elimination of this absorption band and improvement of transmittance in the visible range. The nature of the color center at ≈620 nm is discussed. GSAG:Ce crystals codoped with Li+ and Mg2+:Li+ combine both high transmission and least radiation damage.
Subject
Materials Chemistry,Electrical and Electronic Engineering,Surfaces, Coatings and Films,Surfaces and Interfaces,Condensed Matter Physics,Electronic, Optical and Magnetic Materials
Cited by
1 articles.
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