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Laser- and gamma-ray induced crystallization of IR-transmitting calcium gallate glass

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Abstract

Ar+-laser (λ=488 nm) irradiation of calcium gallate (CG) glass with the composition of 60CaO·39Ga2O3·Fe2O3 resulted in a distinct decrease in the IR transmittance (T) due to the formation of crystalline CaGa2O4 and CaGa4O9 phases. The Mössbauer spectrum of non-irradiated glass comprised a broad doublet due to distorted Fe3+(Td) withδ, Δ, andΓ of 0.20, 1.33, and 1.00 mm s−1, respectively. An additional doublet due to Fe3+(Td) was observed in the Ar+-irradiated glass andδ, Δ, andΓ were 0.17, 1.32, and 0.75 mm s−1, respectively. A decrease inT was also observed after the60Co γ-ray irradiation with doses ≥105Gy, and the precipitation of CaO, Ga2O3, and CaGa4O7 phases was confirmed by X-ray diffraction.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Kyushu University, Hakozaki, Higashiku, 812, Fukuoka, Japan

    T. Nishida, S. Kubuki & Y. Takashima

  2. Research Institute for Electronic Science, Hokkaido University, Kitaku-kita 12, 060, Sapporo, Japan

    M. Mikami & T. Yagi

Authors
  1. T. Nishida
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  2. S. Kubuki
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  3. Y. Takashima
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  4. M. Mikami
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  5. T. Yagi
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Nishida, T., Kubuki, S., Takashima, Y. et al. Laser- and gamma-ray induced crystallization of IR-transmitting calcium gallate glass. Hyperfine Interact 94, 2125–2130 (1994). https://doi.org/10.1007/BF02063750

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