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首页> 外文期刊>Journal of Crystal Growth >Radiation hardness of LuAG:Ce and LuAG:Pr scintillator crystals
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Radiation hardness of LuAG:Ce and LuAG:Pr scintillator crystals

机译：LuAG：Ce和LuAG：Pr闪烁体晶体的辐射硬度

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摘要

Single crystals of LuAG:Ce, LuAG:Pr and un-doped LuAG were grown by the vertical Bridgman method and studied for radiation hardness under gamma-rays with doses in the range 10-10~5 Gy (~(60)Co). A wide absorption band peaking at around 600 nm springs up in all three types of crystals after the irradiations. The second band peaking at around 375 nm appears in both LuAG:Pr and un-doped LuAG. Compositional variations have been done to reveal the spectral behavior of induced color centers in more detail and to understand their origin. Similarities in behavior of Yb2 centers in as-grown garnets are found, indicating that radiation induced color centers can be associated with residual trace amounts of Yb present in the raw materials. Un-doped LuAG and LuAG:Ce demonstrate moderate radiation hardness (the induced absorption coefficients being equal to 0.05-0.08 cm~1 for accumulated doses of 10~3-10~4Gy), while LuAG:Pr is less radiation hard. The ways to improve the radiation hardness are discussed.
机译：通过垂直Bridgman方法生长LuAG：Ce，LuAG：Pr和未掺杂LuAG的单晶，并在10-10〜5 Gy（〜（60）Co）范围内的伽马射线下研究辐射硬度。辐射后，所有三种类型的晶体中都出现了一个峰值约为600 nm的宽吸收带。在LuAG：Pr和未掺杂的LuAG中均出现在375 nm处达到峰值的第二个谱带。已经进行了成分变化以更详细地揭示诱导色中心的光谱行为并了解其起源。发现生长中的石榴石中Yb2中心的行为相似，这表明辐射诱发的色心可能与原料中存在的残留痕量Yb有关。未掺杂的LuAG和LuAG：Ce具有中等的辐射硬度（当累积剂量为10〜3-10〜4Gy时，诱导的吸收系数等于0.05-0.08 cm〜1），而LuAG：Pr的辐射强度较小。讨论了提高辐射硬度的方法。

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  • 来源
    《Journal of Crystal Growth》 |2012年第2012期|212-216|共5页
  • 作者

    M.V. Derdzyan; K.L. Ovanesyan; A.G. Petrosyan; A. Belsky; C. Dujardin; C. Pedrini; E. Auffray; P. Lecoq; M. Lucchini; K. Pauwels;

  • 作者单位

    Institute for Physical Research, National Academy of Sciences, 0203 Ashtarak 2, Armenia;

    Institute for Physical Research, National Academy of Sciences, 0203 Ashtarak 2, Armenia;

    Institute for Physical Research, National Academy of Sciences, 0203 Ashtarak 2, Armenia;

    Universite de Lyon, Universite Lyon 1, CNRS, UMR5620, LPCML, F-69622 Villeurbanne, France;

    Universite de Lyon, Universite Lyon 1, CNRS, UMR5620, LPCML, F-69622 Villeurbanne, France;

    Universite de Lyon, Universite Lyon 1, CNRS, UMR5620, LPCML, F-69622 Villeurbanne, France;

    European Organization for Nuclear Research, CERN, 7211 Geneva 23, Switzerland;

    European Organization for Nuclear Research, CERN, 7211 Geneva 23, Switzerland;

    European Organization for Nuclear Research, CERN, 7211 Geneva 23, Switzerland;

    Universite de Lyon, Universite Lyon 1, CNRS, UMR5620, LPCML, F-69622 Villeurbanne, France,European Organization for Nuclear Research, CERN, 7211 Geneva 23, Switzerland;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    A1. Radiation damage; B1. Garnets; B2. Scintillator materials;

    机译：A1。辐射损伤;B1。石榴石;B2。闪烁体材料;

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