TY - JOUR
T1 - Development of rare earth doped CaS phosphors for radiation detection
AU - Arai, Miki
AU - Fujimoto, Yutaka
AU - Koshimizu, Masanori
AU - Kawamura, Ichiro
AU - Nakauchi, Daisuke
AU - Yanagida, Takayuki
AU - Asai, Keisuke
N1 - Funding Information:
Acknowledgments This research was supported by a Grant-in-Aid for Scientific Research (A) (No. 18H03890, 20182021). A part of this research is based on the Cooperative Research Project of Research Center for Biomedical Engineering, Ministry of Education, Culture, Sports, Science and Technology.
Publisher Copyright:
©2020 The Ceramic Society of Japan. All rights reserved.
PY - 2020/8/1
Y1 - 2020/8/1
N2 - 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 5d4f transitions od Eu2+ ions. The scintillation emission spectrum of CaS:Ce ceramics showed emission peaks at 510 and 570nm that originate from the 5d4f 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.
AB - 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 5d4f transitions od Eu2+ ions. The scintillation emission spectrum of CaS:Ce ceramics showed emission peaks at 510 and 570nm that originate from the 5d4f 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.
KW - Cas
KW - Ceramic scintillator
KW - Rare-earth-doped
KW - Scintillator
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U2 - 10.2109/jcersj2.20036
DO - 10.2109/jcersj2.20036
M3 - Article
AN - SCOPUS:85090159963
SN - 1882-0743
VL - 128
SP - 523
EP - 531
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
IS - 8
ER -