热释电晶体激发源用于X射线荧光分析的研究

详细信息    查看官网全文

• 英文论文题名：An X-ray fluorescence spectrometer based on pyroelectric effect
• 论文作者：樊瑞睿 ; 董亦凡 ; 郭东亚 ; 张春雷 ; 高旻 ; 汪锦州 ; 刘雅清 ; 周大卫 ; 王焕玉
• 英文论文作者：FAN Rui-rui ; DONG Yi-fan ; GUO Dong-ya ; ZHANG Chun-lei ; GAO Min ; WANG Jin-zhou ; LIU Ya-qing ; ZHOU Da-wei ; WANG Huan-yu ; Institute of High Energy Physics ; CAS
• 年：2015
• 作者机构：中国科学院高能物理研究所;
• 论文关键词：热释电 ; 硅漂移探测器 ; X射线荧光分析
• 英文论文关键词：pyroelectric ; silicon drift detector ; X-ray fluorescence analysis
• 会议召开时间：2015-09-21
• 会议录名称：中国核科学技术进展报告（第四卷）——中国核学会2015年学术年会论文集第8册（同位素分卷、辐射研究与应用分卷、核技术工业应用分卷、核农学分卷、核医学分卷、核情报分卷）
• 语种：中文
• 分类号：O657.34
• 学会代码：EGVD
• 会议名称：中国核学会2015年学术年会
• 会议地点：中国四川绵阳
• 主办单位：中国核学会
• 学会名称：中国核学会
• 页数：8
• 文件大小：616k
• 原文格式：O
• 会议级别：全国

摘要

利用热释电晶体实现了一个X射线激发源,并以此激发源和高能量分辨率的硅漂移探测器构建了一个X射线荧光分析谱仪。首先通过分析计算热释电晶体厚度和靶厚度对产生X射线的影响选定了激发源的设计参数;然后测量了激发源发射的X射线本底,其能量范围在1 keV到27 keV,包含有Cu和Ta的特征X射线,最大强度在每秒3 000个计数以上,对本底的测量同时显示出谱仪的探测器部分对Cu的8.05 keV特征峰的分辨率达到210 eV,具有很高的能量分辨率;最后使用该谱仪测试了Fe、Ti和Cr等三种单质样品和高钛玄武岩样品,测试结果表明该谱仪可以有效的分析出样品的元素成分。由于这种X射线荧光分析谱仪的各组成部分体积都很小,进一步便携化后非常适合于非破坏、现场和快速的元素分析场合。
A pyroelectric X-ray generator is implemented,and an X-ray fluorescence spectrometer is accomplished by combining the pyroelectric X-ray generator with a high energy resolution silicon drift detector.Firstly,the parameters of the X-ray generator are decided by analyzing and calculating the influence of the thickness of the pyroelectric crystal and the thickness of the target on emitted X-ray.Secondly,the emitted X-ray is measured.The energy of emitted X-ray is from 1 keV to27 keV,containing the characteristic X-ray of Cu and Ta,and the max counting rate is more than3 000 per second.The measurement also proves that the detector of the spectrometer has a high energy resolution which the FWMH is 210 eV at 8.05 keV.Lastly,samples of Fe,Ti,Cr and high-Ti basalt are analyzed using the spectrometer,and the results are agreed with the elements of the samples.It shows that the spectrometer consisting of a pyroelectric X-ray generator and a silicon drift detector is effective for element analysis.Additionally,because each part of the spectrometer has a small volume,it can be easily modified to a portable one which is suitable for non-destructive,onsite and quick element analysis.

引文

[1]Ge Liang-quan.Rock and Mineral Analysis(岩矿测试),2013,32(2):203.
    [2]Brownridge J D.Nature,1992,358:287.
    [3]Brownridge J D.Raboy S.Journal of Applied Physics,1999,86(1):640.
    [4]Hanamoto K,Kawabe A,Sakoda A,et al.Nuclear Instruments and Methods in Physics Research A,2012,669:66.
    [5]Wu Guang-guo,Huang Yong,Jia Bin,et al.Nuclear Electronics&Detection Technology,2009,29(2):436.
    [6]Rosenman G.Shur D.Krasik Y E,et al.Journal of Applied Physics,2000,88(11):6109.