Radiation-induced luminescence centres in Sm:MgF2 ceramics

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION B-BEAM INTERACTIONS WITH MATERIALS AND ATOMS

卷:435

Article; Proceedings Paper

Okada, Go¹  Nakamura, Fumiya¹  Kawano, Naoki¹  Kawaguchi, Noriaki¹  Kasap, Safa²  Yanagida, Takayuki¹ 

[1] Nara Inst Sci & Technol NAIST, Grad Sch Mat Sci, 8916-5 Takayama, Nara 6300192, Japan

[2] Univ Saskatchewan, Dept Elect & Comp Engn, 57 Campus Dr, Saskatoon, SK S7N5A9, Canada

关键词: Radio-photoluminescence;    RPL;    MgF2;    Sm;    Dosimeter;    X-rays;   

DOI  :  10.1016/j.nimb.2018.01.032

来源: Elsevier

【 摘 要 】

We have prepared Sm:MgF2 ceramics by the spark plasma sintering technique and studied the radio-photo-luminescence (RPL) properties. RPL is a phenomenon seen in selected phosphors in which a new photoluminescence (PL) emission centre is generated by ionizing radiations such as X-rays. In the present system, RPL is observed with two different emissions in the blue and near infrared (NIR) ranges due to M(C-2h) and M(C-1) centres. The dynamic range using the former centre is in the high dose range above 100 Gy while the former centres have a sensitivity below 100 Gy. In addition, heat-treating an irradiated 0.01%Sm:MgF2 sample induces the reduction of the Sm3+-ion, i.e. Sm3+ -> Sm2+). These centres are metastable, and their concentration can be increased or decreased by heat-treatment and exposing to UV light.

【 授权许可】

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