Effect of annealing and gamma irradiation on undoped and Eu3+-doped Y2SiO5 single crystals

• Published in: Journal of crystal growth 2006, Vol.286 (1), p.126-130
• Main Authors: Pang, Huiyong, Zhao, Guangjun, Su, Liangbi, Jie, Mingyin, He, Xiaoming, Xu, Jun
• Format: Article
• Language: English
• Subjects: Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization; Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Condensed matter: structure, mechanical and thermal properties; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Materials science; Physical radiation effects, radiation damage; Physics; Structure of solids and liquids; crystallography; Treatment of materials and its effects on microstructure and properties; γ ray effects
• ISSN: 0022-0248; 1873-5002
• DOI: 10.1016/j.jcrysgro.2005.09.049

The absorption spectra of the undoped Y2SiO5 and Eu3+-doped Y2SiO5 crystals grown by the Czochralski technique were compared before and after annealing and, similarly, the unannealed and annealed crystals after y-ray irradiation. The absorption bands of Eu2+ ions with peaks at 300 and 390nm were observed in the as-grown Y2SiO5:Eu3+ crystal. These peaks were more intense in H2-annealed and irradiated Y2SiO5:Eu3+ crystals. The additional absorption peaks at 260 and 320-330nm which were attributed to F color centers and O- hole centers were observed in irradiated undoped Y2SiO5 and Y2SiO5:Eu3+ crystals, respectively.