Scintillation and dosimeter properties of CaF₂ transparent ceramic doped with Eu²⁺

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• 作者：Fumiya Nakamura^a ; ^{nakamura.fumiya.nz9@ms.nasit.jp" class="auth_mail" title="E-mail the corresponding author} ; Takumi Kato^a ; Go Okada^a ; Noriaki Kawaguchi^a ; Kentaro Fukuda^b ; Takayuki Yanagida^a
• 关键词：Transparent Ceramic ; CaF2 ; Scintillator ; Dosimeter ; Eu
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：43
• 期：1
• 页码：604-609
• 全文大小：1354 K

文摘

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 ¹³⁷Cs 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 °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).