Journal
CERAMICS INTERNATIONAL
Volume 43, Issue 1, Pages 604-609Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2016.09.201
Keywords
Transparent Ceramic; CaF2; Scintillator; Dosimeter; Eu
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Funding
- Ministry of Education, Culture, Sports, Science and Technology of the Japanese government (MEXT) [26249147]
- Japan Science and Technology Agency (JST)
- STEP
- Grants-in-Aid for Scientific Research [16H06983] Funding Source: KAKEN
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We have developed CaF2 transparent ceramics doped with Eu2+(CaF2:Eu) by using spark plasma sintering (SPS), and investigated the scintillation, dosimeter and photoluminescence (PL) properties. Under X-ray irradiation, all the samples showed emission due to self-trapped excitons (STE) and 5d-4f transition of Eu2+ at 300 and 430 nm, respectively. In addition, weak emission due to the 4f-4f transitions of Eu3+ at 570, 590, 615 and 625 nm were also present in all the samples. Under Cs-137 irradiation, the light yields of the 0.01, 0.02, 0.05 and 0.1 Eu-doped samples were estimated to be 16,400, 15,400, 17,700 and 14,300 photons/MeV, respectively. Thermally stimulated luminescence (TSL) glow curves of all the samples exhibited glow peaks at 100 and 180 degrees C, and these intensities increased linearity as a function of X-ray dose from 0.1 to 1000 mGy. Furthermore, the CaF2:Eu showed not only TSL but also optically stimulated luminescence (OSL).
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