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首页> 外文期刊>Nuclear Instruments & Methods in Physics Research >Study on effects of swift heavy ion irradiation on the crystal structure in CeO_2 doped with Gd_2O_3
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Study on effects of swift heavy ion irradiation on the crystal structure in CeO_2 doped with Gd_2O_3

机译：快速重离子辐照对掺Gd_2O_3的CeO_2中晶体结构的影响

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摘要

To simulate the effects of Gd_2O_3-doping and high-energy fission products in UO_2, Gd_2O_3-doped CeO_2 pellets were irradiated with 200-MeV Xe~(14+) ions. Doping and irradiation effects were analyzed using X-ray diffraction (XRD) and extended X-ray absorption fine structure (EXAFS). The lattice constant of CeO_2 decreases and the local structure is disordered with increased doping levels. However, the irradiation induces an expansion of the lattice and a disordering of atomic arrangement near the Gd atoms. The effects of the irradiation become more pronounced with increasing Gd2O3-dopant levels. Our results are compared with those of a study involving Er_2O_3-doped CeO_2.
机译：为了模拟Ud_2中Gd_2O_3掺杂和高能裂变产物的作用，对Gd_2O_3掺杂的CeO_2球团进行了200MeV Xe〜（14+）离子的辐照。使用X射线衍射（XRD）和扩展X射线吸收精细结构（EXAFS）分析了掺杂和辐照效果。 CeO_2的晶格常数降低，并且局部结构随着掺杂水平的增加而无序。但是，照射引起晶格的膨胀和Gd原子附近的原子排列的无序。随着Gd2O3掺杂水平的提高，辐照的效果变得更加明显。我们的结果与涉及Er_2O_3掺杂的CeO_2的研究结果进行了比较。

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  • 作者

    Y. Tahara; B. Zhu; S. Kosugi; N. Ishikawa; Y. Okamoto; F. Hori; T. Matsui; A. Iwase;

  • 作者单位

    Department of Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan;

    Department of Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan;

    Department of Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan;

    Japan Atomic Energy Agency (JAEA-Tokai), Tokai, Ibaraki 319-1195, Japan;

    Japan Atomic Energy Agency (JAEA-Tokai), Tokai, Ibaraki 319-1195, Japan;

    Department of Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan;

    Department of Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan;

    Department of Materials Science, Osaka Prefecture University, Sakai, Osaka 599-8531, Japan;

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  • 正文语种 eng
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  • 关键词

    ceo_2; gd2o3-doping; ion irradiation; xrd; exafs;

    机译：ceo_2;gd2o3-掺杂;离子辐照;xrd;暴露;

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