CLYC探测器n/γ聚类甄别方法研究

黄广伟, 周春芝, 许智宁, 肖无云, 张羽中, 樊海军

黄广伟, 周春芝, 许智宁, 肖无云, 张羽中, 樊海军. CLYC探测器n/γ聚类甄别方法研究[J]. 原子能科学技术, 2018, 52(8): 1481-1486. DOI: 10.7538/yzk.2017.youxian.0708
引用本文: 黄广伟, 周春芝, 许智宁, 肖无云, 张羽中, 樊海军. CLYC探测器n/γ聚类甄别方法研究[J]. 原子能科学技术, 2018, 52(8): 1481-1486. DOI: 10.7538/yzk.2017.youxian.0708
HUANG Guangwei, ZHOU Chunzhi, XU Zhining, XIAO Wuyun, ZHANG Yuzhong, FAN Haijun. Study on n/γ Discrimination Method Based on Clustering Analysis for CLYC Detector[J]. Atomic Energy Science and Technology, 2018, 52(8): 1481-1486. DOI: 10.7538/yzk.2017.youxian.0708
Citation: HUANG Guangwei, ZHOU Chunzhi, XU Zhining, XIAO Wuyun, ZHANG Yuzhong, FAN Haijun. Study on n/γ Discrimination Method Based on Clustering Analysis for CLYC Detector[J]. Atomic Energy Science and Technology, 2018, 52(8): 1481-1486. DOI: 10.7538/yzk.2017.youxian.0708

CLYC探测器n/γ聚类甄别方法研究

Study on n/γ Discrimination Method Based on Clustering Analysis for CLYC Detector

  • 摘要: 为了高性能分辨探测中子与γ射线,搭建了一套基于Cs2LiYCl6:Ce3+(CLYC)探测器和数字示波器的数字化核脉冲采集系统。通过Matlab编程,研究了系统聚类法和K-means聚类法两种n/γ脉冲波形甄别方法,并与传统的电荷比较法进行了对比。结果表明,两种聚类法均可准确分辨脉冲类别,K-means聚类法在计算时间和内存占用方面更具优势,有利于实时脉冲处理。该研究为研制基于CLYC探测器的n/γ双模式探测谱仪提供了一种有用的脉冲波形甄别技术解决方案。

     

    Abstract: In order to discriminate neutron and γ ray with high performance, a digital nuclear pulse sampling system based on a Cs2LiYCl6: Ce3+ (CLYC) detector and a digital oscilloscope was set up. By Matlab programming, two pulse shape discrimination methods, including hierarchical clustering method and K-means clustering method were studied, and were compared with the traditional charge comparison method. The results show that both of these two methods can discriminate neutron and γ pulses accurately. The K-means clustering method is better for less computing time and memory consumption, and makes profit for real-time pulse discriminating. This research provides a useful pulse shape discrimination solution to develop the n/γ dual-mode spectrometer with CLYC detector.

     

  • [1] 丁大钊,叶春堂,赵志祥. 中子物理学[M]. 北京:原子能出版社,2001.
    [2] GLODO J, HAWRAMI R, van LOEF E, et al. Pulse shape discrimination with selected elpasolite crystals[J]. IEEE Transactions on Nuclear Science, 2012, 59(5): 2328-2333.
    [3] BOURNE M M, MUSSI C, MILLER E C, et al. Characterization of the CLYC detector for neutron and photon detection[J]. Nuclear Instruments and Methods in Physics Research A, 2014, 736: 124-127.
    [4] GLODO J, HAWRAMI R, SHAH K S. Development of Cs2LiYCl6 scintillator[J]. Journal of Crystal Growth, 2013, 379: 73-78.
    [5] COMBES C M, DORENBOS P, van EIJK C W E, et al. Optical and scintillation properties of pure and Ce3+ doped Cs2LiYCl6 and LiYCl6:Ce3+ crystals[J]. Journal of Luminescence, 1999, 82(4): 299-305.
    [6] van LOEF E, GLODO J, HIGGINS W M, et al. Optical and scintillation properties of Cs2LiYCl6: Ce3+ and Cs2LiYCl6: Pr3+ crystals[J]. IEEE Transactions on Nuclear Science, 2005, 52(5): 1819-1822.
    [7] GLODO J, HIGGINS W M, van LOEF E, et al. Cs2LiYCl6: Ce scintillator for nuclear monitoring applications[J]. IEEE Transactions on Nuclear Science, 2009, 56(3): 1257-1261.
    [8] HIGGINS W M, GLODO J, SHIRWADKAR U, et al. Bridgman growth of Cs2LiYCl6: Ce and 6Li-enriched Cs62LiYCl6: Ce crystals for high resolution gamma ray and neutron spectrometers[J]. Journal of Crystal Growth, 2010, 312(8): 1216-1220.
    [9] WHITNEY C M, SOUNDARA-PANDIAN L, JOHNSON E B, et al. Gamma-neutron imaging system utilizing pulse shape discrimination with CLYC[J]. Nuclear Instruments and Methods in Physics Research A, 2015, 784: 346-351.
    [10] 王晴晴,史坚,李焕英,等. Cs2LiYCl6:Ce闪烁晶体的光学及闪烁性能[J]. 无机材料学报,2017,32(2):175-179.WANG Qingqing, SHI Jian, LI Huanying, et al. Optical and scintillation properties of Cs2LiYCl6: Ce crystal[J]. Journal of Inorganic Materials, 2017, 32(2): 175-179(in Chinese).
    [11] DOLYMPIA N, CHOWDHURY P, LISTER C J, et al. Pulse-shape analysis of CLYC for thermal neutrons, fast neutrons, and gamma-rays[J]. Nuclear Instruments and Methods in Physics Research A, 2013, 714: 121-127.
    [12] DUDA R O, HART P E, STORK D G. Pattern classification[M]. US: John Wiley & Sons, 2012.
    [13] ARTHUR D, VASSILVITSKII S. K-means++: The advantages of careful seeding[J]. Society for Industrial and Applied Mathematics, 2007, 11(6): 1027-1035.
    [14] 肖无云,魏义祥,艾宪芸,等. 数字化多道脉冲幅度分析技术研究[J]. 核技术,2005,28(10):787-790.XIAO Wuyun, WEI Yixiang, AI Xianyun, et al. Research on digital multi-channel pulse height analysis techniques[J]. Nuclear Techniques, 2005, 28(10): 787-790(in Chinese).
    [15] KNOLL G F. Radiation detection and measurement[M]. New York: Wiley, 2000.
计量
  • 文章访问数:  460
  • HTML全文浏览量:  1
  • PDF下载量:  1133
  • 被引次数: 0
出版历程
  • 刊出日期:  2018-08-19

目录

    /

    返回文章
    返回