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AMS measurements of fission products at CIAE

机译：CIAE裂变产物的AMS测量

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摘要

Fission products are present in special nuclear materials as contaminants remaining from isotope separation or reprocessing, or through ingrowth due to spontaneous and neutron induced fission. The long half-lived fission products (LLFPs) are among the most dangerous radionudides to the environment. Ultra-high-sensitivity measurement of LLFPs in rocks or soil samples from the fission environment would provide very important information for nuclear safety inspection. The Beijing HI-13-AMS facility with a high terminal voltage of 13 MV is suitable for measuring LLFPs, especially for heavy fission products such as ~(79)Se, ~(93)Zr, ~(99)Tc, ~(107)Pd, ~(121m)Sn, ~(126)Sn, ~(199)I and ~(151)Sm. In this paper some new methods developed for AMS measurement of ~(79)Se, ~(93)Zr, ~(99)Tc, ~(121m)Sn, ~(126)Sn, ~(129)I and ~(151)Sm are presented. Major features of these methods will be introduced, including the preparation of samples, the selection of target material and the molecular ions extracted from the material in the ion source, as well as the identification and detection of the nuclides to be determined.
机译：裂变产物存在于特殊的核材料中，是由于同位素分离或后处理或由于自发和中子诱发的裂变而向内生长而残留的污染物。长寿命的裂变产物（LLFP）是对环境最危险的放射性核素之一。来自裂变环境的岩石或土壤样品中LLFP的超高灵敏度测量将为核安全检查提供非常重要的信息。北京HI-13-AMS设备具有13 MV的高终端电压，适用于测量LLFP，尤其适用于重裂变产物，例如〜（79）Se，〜（93）Zr，〜（99）Tc，〜（107） Pd，〜（121m）Sn，〜（126）Sn，〜（199）I和〜（151）Sm。本文开发了一些新方法用于AMS测量〜（79）Se，〜（93）Zr，〜（99）Tc，〜（121m）Sn，〜（126）Sn，〜（129）I和〜（151）出现了将介绍这些方法的主要特征，包括样品制备，目标材料的选择以及从离子源中的材料中提取的分子离子，以及鉴定和检测待测定的核素。

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  • 作者

    Hongtao Shen; Shan Jiang; Ming He; Kejun Dong; Yinggen Ouyang; Zhenyu Li; Yongjing Guan; Xinyi Yin; Bo Peng; Duo Zhou; Jian Yuan; Shaoyong Wu;

  • 作者单位

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China,College of Physics and Technology, Guangxi Normal University, Guilin 541004, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

    College of Physics Science and Technology, Guangxi University, Nanning 530004, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

    China Institute of Atomic Energy, P.O. Box 275-80, Beijing 102413, China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    accelerator mass spectrometry; ~(93)Zr; ~(121m)Sn; ~(126)Sn; fission products;

    机译：加速器质谱;〜（93）Zr;〜（121m）Sn;〜（126）锡;裂变产物;

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