便携式伽马谱仪中的核素算法研究

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    手持式核素识别仪(Radioisotope Identification Device,RID)是一种基于多道谱仪的多功能便携式核监测设备,可用于放射性核素的检测、剂量率监测、放射源定位以及核能谱采集与核素识别。其工作原理是根据所测放射性核素的特征γ射线能谱,分析识别出对应核素。它能为危机管理提供核材料探查和鉴别手段,为后果管理提供放射性污染核素组成的测量与分析手段。
     随着科技的发展和对核技术认识的深入,为了便于及时了解或快速分析,手持式仪器或与智能机器人捆绑的轻便型仪器显得越来越重要。便携式谱仪 CPU 运算能力有限、存储器较小,并且要求在较弱的放射性水平、较短的测量时间条件下, 快速、准确地给出核素识别结果, 具有其特殊性和难度。随着科技的发展和对核技术认识的深入,为了便于及时了解或快速分析,手持式仪器或与智能机器人捆绑的轻便型仪器显得越来越重要。本文结合国内、外的相关Y射线测量的理论和技术实践,对手持式Y能谱测量仪进行了深入研究。6713
    关键词:伽玛能谱    核素识别仪    核素匹配     环境检测
    Abstract
      Portable radioisotope identify device belongs to the multi-function portable nuclear monitoring equipment which is based on the multi-channel spectrometer.It can be used for radionuclide detection,dose-rate monitoring and radioactive source positioning and nuclear energy spectrum acquisition and radionuclide recognition.Its principle of work is based on the characteristics of radioactive nuclides measure gamma energy spectrum,and the corresponding analysis identified).It can provide nuclear materials of crisis management,detection and identification method for consequence management provide radioactive pollution to the measurement and analysis of nuclide means.
       With the development of science and technology and in-depth understanding of nuclear technology, in order to facilitate to keep abreast of rapid analysis, handheld instrument, or bundled with intelligent robots Portable apparatus becomes more and more important.Portable spectrometer limited CPU power, less memory, and requires the weak levels of radioactivity, short measurement time conditions quickly and accurately given radionuclide identification results, has its particularity and difficulty.It is widely used in the detection of radiation environment, health and epidemic prevention, import and export commodity inspection, to mass spectrometry investigation, radiology, building materials, petrochemical -and other fields.With the development of science and technology and in-depth understanding of nuclear technology, in order to facilitate to keep abreast of rapid analysis, handheld instrument, or bundled with intelligent robots Portable apparatus becomes more and more important. In this paper, the theory and practice of domestic and foreign Y-ray measurements, the handheld Y spectroscopy measuring instrument conducted in-depth research.
    Keyword:Gamma spectrometry    Radionuclide identification device   Radionuclide match    Environmental testing
      目录
    1  课题背景    1
    1.1  概述    1
    1.1.1  国内外核与辐射恐怖主义威胁    1
    1.1.2  数字化多道谱仪系统需求    2
    1.2.  γ射线探测器    3
    1.3  论文主要研究内容    3
    2  便携式γ谱仪能谱分析方法    5
    2.1  γ能谱平滑    5
    2.1.1  最小二乘移动平滑方法    6
    2.1.2  FIR低通滤波平滑    6
    2.2  γ能谱寻峰    8
    2.2.1  匹配滤波器寻峰方法    9
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