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首页> 外文期刊>Materials Science and Engineering >Crystal growth and luminescence properties of Lu_(0.8)Sc_(0.02)BO_3 scintillators doped with different Ce concentrations
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Crystal growth and luminescence properties of Lu_(0.8)Sc_(0.02)BO_3 scintillators doped with different Ce concentrations

机译：掺Ce浓度的Lu_（0.8）Sc_（0.02）BO_3闪烁体的晶体生长和发光特性

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摘要

Transparent Lu_(0.8)Sc_(0.02)BO_3: Ce single crystals doped with different Ce concentrations were grown by the Czochralski method. X-ray diffraction measurements showed that the as-grown crystals all possessed hexagonal structure with R3c space group. The more initial Ce ion doping content in Lu_(0.8)Sc_(0.02)BO_3:Ce, the smaller effective segregation coefficient of Ce in crystal will be, confirmed by the inductively coupled plasma atomic emission spectrometry (ICP-AES) tests. The Ce~(3+) 5d →4f emission band and five excitation states were both observed in the photoluminescence spectra (PL). The increase of luminescence center in crystal or the concentration quenching exerts effects in the change of PL decay time, depending on the cerium concentration. The radioluminescence spectra showed that the Lu_(0.8)Sc_(0.02)BO_3:Ce crystals had one broad emission band corresponding to the 5d → 4f transition of Ce~(3+) ions, similar to their PL spectra. Consequently, we found that Lu_(0.8)Sc_(0.02)BO_3 :2 at.% Ce crystal achieved the maximum scintillation efficiency and for Lu_(0.8)Sc_(0.02)BO_3 :3 at.%Ce crystal, there might be already affected by a concentration quenching effect.
机译：透明Lu_（0.8）Sc_（0.02）BO_3：通过Czochralski法生长掺杂有不同Ce浓度的Ce单晶。 X射线衍射测量表明，所生长的晶体均具有带R3c空间基团的六边形结构。电感耦合等离子体原子发射光谱法（ICP-AES）证实，Lu_（0.8）Sc_（0.02）BO_3：Ce中初始Ce离子掺杂含量越高，晶体中Ce的有效偏析系数越小。 Ce〜（3+）5d→4f的发射带和五个激发态均在光致发光光谱（PL）中观察到。取决于铈浓度，晶体中发光中心的增加或浓度猝灭对PL衰减时间的改变产生影响。放射性发光光谱表明，Lu_（0.8）Sc_（0.02）BO_3：Ce晶体具有一个较宽的发射带，与Ce〜（3+）离子的5d→4f跃迁相对应，类似于其PL光谱。因此，我们发现Lu_（0.8）Sc_（0.02）BO_3：2 at。％Ce晶体达到了最大闪烁效率，对于Lu_（0.8）Sc_（0.02）BO_3：3 at。％Ce晶体，可能已经受到影响通过浓度淬灭作用。

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  • 来源
    《Materials Science and Engineering》 |2011年第12期|p.889-893|共5页
  • 作者

    Yuntao Wu; Dongzhou Ding; Shangke Pan; Fan Yang; Guohao Ren;

  • 作者单位

    Shanghai Institute of Ceramics, Chinese Academy of Sciences, No. 215 Chengbei Road, Jiading, Shanghai 201800, PR China;

    Shanghai Institute of Ceramics, Chinese Academy of Sciences, No. 215 Chengbei Road, Jiading, Shanghai 201800, PR China;

    Shanghai Institute of Ceramics, Chinese Academy of Sciences, No. 215 Chengbei Road, Jiading, Shanghai 201800, PR China;

    Shanghai Institute of Ceramics, Chinese Academy of Sciences, No. 215 Chengbei Road, Jiading, Shanghai 201800, PR China;

    Shanghai Institute of Ceramics, Chinese Academy of Sciences, No. 215 Chengbei Road, Jiading, Shanghai 201800, PR China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    lutetium scandium orthoborate; solid solution; scintillation; cerium concentration;

    机译：bor硼酸scan;实在的方法;闪烁铈浓度;

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