Optical and scintillation properties of Sc₂O₃, Y₂O₃ and Lu₂O₃ transparent ceramics synthesized by SPS method

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• 作者：Yoshisuke Futami ; Takayuki Yanagida ; Yutaka Fujimoto ; Jan Pejchal ; Makoto Sugiyama ; Shunsuke Kurosawa ; Yuui Yokota ; Akihiko Ito ; Akira Yoshikawa ; Takashi Goto
• 关键词：Scintillation properties ; Transparent ceramics ; Sesquioxide ; Light yield ; Gamma-ray
• 刊名：Radiation Measurements
• 出版年：2013
• 出版时间：August, 2013
• 年：2013
• 卷：55
• 期：Complete
• 页码：136-140
• 全文大小：685 K

文摘

Sc₂O₃, Y₂O₃ and Lu₂O₃ transparent ceramics were prepared by the spark plasma sintering (SPS) method. After polishing, the samples were semitransparent. Their optical transmittance was 10-40 % at 500?nm which corresponded with their semi-transparency. In the X-ray induced emission spectra, a broad emission peak appeared around 335?nm in each sample. For this wavelength, scintillation decay time for Y₂O₃ and Sc₂O₃ were 22 and 48?ns, respectively. The light yield of Sc₂O₃, Y₂O₃ and Lu₂O₃ was 16,200, 2600, and 200?ph/5.5?MeV-alpha, respectively, which followed from the alpha-ray induced pulse height spectra. The gamma-ray induced light yield of Sc₂O₃ was 11,500?ph/MeV, which is 1.4 times larger than that of conventional single crystal BGO (Bi₄Ge₃O₁₂) scintillator. Light yield non-proportionality and energy resolution of Sc₂O₃ were examined for the first time.