Development of rare earth doped CaS phosphors for radiation detection
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- ARAI Miki
- Department of Applied Chemistry, Graduate School of Engineering, Tohoku University
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- FUJIMOTO Yutaka
- Department of Applied Chemistry, Graduate School of Engineering, Tohoku University
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- KOSHIMIZU Masanori
- Department of Applied Chemistry, Graduate School of Engineering, Tohoku University
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- KAWAMURA Ichiro
- Department of Applied Chemistry, Graduate School of Engineering, Tohoku University
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- NAKAUCHI Daisuke
- Graduate School of Materials Science, Nara Institute of Science and Technology
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- YANAGIDA Takayuki
- Graduate School of Materials Science, Nara Institute of Science and Technology
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- ASAI Keisuke
- Department of Applied Chemistry, Graduate School of Engineering, Tohoku University
抄録
<p>CaS-based materials are known as highly efficient phosphors. CaS has excellent properties as host materials of phosphors under ultraviolet irradiation and is expected to have also for radiation detection. In this study, we fabricated CaS ceramic phosphors and measured their photoluminescence (PL), scintillation, and dosimetry characteristics to investigate the applicability of CaS ceramics as scintillators and dosimeters. The scintillation emission spectrum of CaS:Eu ceramics showed an emission peak at 656 nm, originating from the 5d–4f transitions od Eu2+ ions. The scintillation emission spectrum of CaS:Ce ceramics showed emission peaks at 510 and 570 nm that originate from the 5d–4f transitions of Ce3+ ions. The PL emission peaks of CaS:Ce and CaS:Eu were similar to those of the X-ray-induced radioluminescence emission peaks and were also assigned to the emission of Ce3+ and Eu2+ ions. The light yield of CaS:Ce and CaS:Eu were estimated to be approximately 1,700 and 4,400 photons/MeV, respectively. As for CaS:Eu, significant afterglow and strong thermoluminescence were observed, which indicates the sample contained trap sites at high concentration. Considering their PL, thermoluminescence, and scintillation properties, CaS:Ce and CaS:Eu have potentials for application as scintillators and dosimeters, respectively.</p>
収録刊行物
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 128 (8), 523-531, 2020-08-01
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390566775157007872
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- NII論文ID
- 130007884005
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- ISSN
- 13486535
- 18820743
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- Crossref
- CiNii Articles
- KAKEN
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- 抄録ライセンスフラグ
- 使用不可