能谱映射快速变换方法研究  

Study on a Fast Conversion Method for Spectrum Relocation

作　　者：赵丹[1,2] 温自强[3] 张庆贤[3] ZHAO Dan;WEN Zi-qiang;ZHANG Qing-xian(China University of Geosciences,College of Geophysical Exploration and Information Technique,Beijing 100083,China;Beijing Research Institute of Uranium Geology,CNNC Key Laboratory of Uranium Resource Exploration and Evaluation Technology,Beijing 100029,China;College of Nuclear Technology and Automation Engineering,Chengdu University of Technology,Chengdu 610059,China)

机构地区：[1]中国地质大学(北京)地球物理与信息技术学院,北京100083 [2]核工业北京地质研究院,中核集团铀资源勘查与评价技术重点实验室,北京100029 [3]成都理工大学核技术与自动化工程学院,成都610059

出　　处：《核电子学与探测技术》2018年第1期137-140,145,共5页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(41774190)资助.

摘　　要：构建了一种快速能谱映射方法,即采用均匀分布模型、线性模型和二次函数模型对能谱数据进行细化,然后根据目标能量轴进行能谱信息重组,从而实现能谱映射。将该能谱映射方法应用于X射线荧光能谱的线性映射和NaI(Tl)γ能谱二次压缩变换(QCC)中,并对映射前后的特征峰半高宽和峰面积信息进行了比较。结果表明:能谱线性映射可较好地保留特征峰信息;QCC变换可实现特征峰等宽谱,并能够保持峰面积近似不变。A fast spectrum relocation method is established with which the spectrum relocation is realized by subdividing the spectrum data into segments by using uniform distribution model, linear distribution model and quadratic distribution model for the first step and recombining the segments into a new spectrum according to the given energy scale for the second step. This fast spectrum relocation method is used in spectrum relocation for x-ray spectrum analysis and in Quadratic Compression Conversion （ QCC ） for NaI （Tl） gamma ray spectrum analysis. Comparison is made for the information of the FWHM and area of characteristic peaks before and after relocation. The results show that the information of characteristic peaks could be well kept with hnear spectrum relocation; with QCC, the same wide peak spectrum could he realized and areas of the peak could be almost the same before and after relocation.

关 键 词：能谱映射 线性变换 二次压缩 能谱分析 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]