As-grown color centers and radiation damage in Ce3+-doped dense rare-earth orthoaluminate scintillators

Ashot G. Petrosyan; Grigoriy O. Shirinyan; Karine L. Ovanesyan; Tat'yana I. Butaeva; Christian Pedrini; Christophe Dujardin; Andrey Belsky

doi:10.1117/12.375281

28 December 1999 As-grown color centers and radiation damage in Ce³⁺-doped dense rare-earth orthoaluminate scintillators

Ashot G. Petrosyan, Grigoriy O. Shirinyan, Karine L. Ovanesyan, Tat'yana I. Butaeva, Christian Pedrini, Christophe Dujardin, Andrey Belsky

Author Affiliations +

Proceedings Volume 4060, New Trends in Atomic and Molecular Spectroscopy; (1999) https://doi.org/10.1117/12.375281
Event: New Trends in Atomic and Molecular Spectroscopy, 1999, none, Russian Federation

Abstract

Optical transmission and scintillation light yields were measured in Ce³⁺-doped LuAlO₃ and (LuY)AlO₃ solid solution single crystals grown by the vertical Bridgman and Czochralski processes. Depending on the growth history, the crystals exhibit dissimilar transmission properties in the UV range. The as-grown color centers possibly responsible for poor transmission properties in the range of Ce³⁺ emission were characterized by exposing non-activated crystals to 1 Mrad of ⁶⁰Co gamma-rays. Radiation induced absorption in Ce³⁺-doped crystals is found to be higher in crystals with good initial transmission properties, while the crystals with high density of as-grown color centers are radiation hard. With time, partial slow-rate natural recovery from the damage was observed at room temperature in all studied crystals. Annealing at higher temperatures or optical bleaching contribute to recombination of gamma-ray induced color centers but affect inconsiderably the as-grown color centers.

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Ashot G. Petrosyan, Grigoriy O. Shirinyan, Karine L. Ovanesyan, Tat'yana I. Butaeva, Christian Pedrini, Christophe Dujardin, and Andrey Belsky "As-grown color centers and radiation damage in Ce³⁺-doped dense rare-earth orthoaluminate scintillators", Proc. SPIE 4060, New Trends in Atomic and Molecular Spectroscopy, (28 December 1999); https://doi.org/10.1117/12.375281

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