Scintillation and TSL properties of MgF2 transparent ceramics doped with Eu2+ synthesized by spark plasma sintering

JOURNAL OF ALLOYS AND COMPOUNDS

卷:726

Article

Nakamura, Fumiya¹  Kato, Takumi¹  Okada, Go¹  Kawaguchi, Noriaki¹  Fukuda, Kentaro²  Yanagida, Takayuki¹ 

[1] Nara Inst Sci & Technol NAIST, 8916-5 Takayama Cho, Ikoma, Nara 6300192, Japan

[2] Tokuyama Corp, 1-1 Mikage Cho, Shunan, Yamaguchi 7458648, Japan

关键词: Transparent ceramic;    MgF2;    Scintillator;    Dosimeter;    Eu;   

DOI  :  10.1016/j.jallcom.2017.07.320

来源: Elsevier

【 摘 要 】

We have developed MgF2:Eu transparent ceramics using spark plasma sintering (SPS) and investigated the photoluminescence (PL), scintillation and dosimeter properties. Under X-ray irradiation, intense peaks appeared at 390 and 430 nm in all the samples. They were attributed to the 5d-4f transitions of Eu2+ and some kinds of defect centers generated by doping with Eu2+, respectively. The scintillation decay times of the emissions at 430 nm for the 0.01, 0.02, 0.05 and 0.1% Eu-doped samples were 21.1,20.9, 18.6 and 23.4 ms, respectively. Furthermore, all the samples showed a thermally stimulated luminescence (TSL) over 120-250 degrees C. The TSL response was very sensitive to irradiation dose and showed a good linearity from 0.01 mGy to 100 mGy. The TSL emission measured at 170 degrees C was only by the luminescence band at 430 nm due to defect centers. (C) 2017 Elsevier B.V. All rights reserved.

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