Development of rare earth doped CaS phosphors for radiation detection

Miki Arai, Yutaka Fujimoto, Masanori Koshimizu, Ichiro Kawamura, Daisuke Nakauchi, Takayuki Yanagida, Keisuke Asai

研究成果: Article査読

5 被引用数 (Scopus)


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.

ジャーナルJournal of the Ceramic Society of Japan
出版ステータスPublished - 2020 8月 1

ASJC Scopus subject areas

  • セラミックおよび複合材料
  • 化学 (全般)
  • 凝縮系物理学
  • 材料化学


「Development of rare earth doped CaS phosphors for radiation detection」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。