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Effect of γ‐irradiation on spectral properties of undoped Y 2 SiO 5 crystals
Author(s) -
Pang Huiyong,
Zhao Guangjun,
Su Liangbi,
Jie Mingyin,
He Xiaoming,
Xu Jun
Publication year - 2006
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200510570
Subject(s) - irradiation , crystal (programming language) , absorption (acoustics) , materials science , absorption spectroscopy , annealing (glass) , analytical chemistry (journal) , oxygen , crystallography , chemistry , optics , nuclear physics , chromatography , physics , organic chemistry , computer science , composite material , programming language
The absorption spectra of undoped Y 2 SiO 5 crystals were studied before and after γ‐irradiation. After γ‐irradiation, the additional absorption peaks at 260‐270 and 320nm were observed in as‐grown and H 2 ‐annealed Y 2 SiO 5 crystal, but it did not occur in air‐annealed Y 2 SiO 5 crystal. These absorption peaks were attributed to F color centers and O – hole centers, respectively. Owing to more oxygen vacancies and color centers in H 2 ‐annealed Y 2 SiO 5 crystal than that in as‐grown Y 2 SiO 5 crystal after γ‐irradiation, the additional absorption peaks were more intense in the former than that in the latter. With the irradiation dose increasing from 20 to 220kGy, the intensity of additional absorption peaks increased. © 2006 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim