α能谱数据平滑及平滑优度评价方法研究  

Research of α Energy Spectrum Smoothing And The Method of Appraising Smooth Goodness

作　　者：贾永杰[1] 马文彦[1] 邱晓林[1] 曾甜[1] 任金宝[1] 

机构地区：[1]第二炮兵工程学院102教研室,西安710025

出　　处：《核电子学与探测技术》2008年第6期1091-1093,共3页Nuclear Electronics & Detection Technology

摘　　要：文章通过利用重心法和多项式最小二乘法对实测α能谱进行平滑,阐明α能谱数据平滑处理的目的及意义。依据平滑后的谱数据,利用MATLAB7.0中的曲线拟合工具箱进行多项式样条插值拟合,找出了简单、实用的拟合优度的评价方法。并通过分析平滑窗口和平滑次数对α谱形的影响,针对实测α谱形,给出了直观、准确、方便的选取最佳平滑窗口和平滑次数的方法。从而解决了平滑窗口和平滑次数选择比较难确定的问题,提高了谱数据处理的精度和准确度。This paper smooth a experimented a energy spectrum by the means of average and polynomial method, and illustrate the aim and significance of data smoothness of α energy spectrum. According to the fitted energy spectrum, we find a simply and useful method of appraising smooth goodness with smoothing spline in the curve fitting tool of MATLAB7.0. A visual, precise and convenient way of selecting optimal smooth windows and times is found through the analyzing the effect of smooth window and times to α energy spectrum. The problem that how to use a optimal smooth windows and times during smoothing energy spectrum is apparently solved, and also raise the precision and accuracy of analysis of the energy spectrum.

关 键 词：数据平滑 重心法 最小二乘法 拟合优度 

分 类 号：O571[理学—粒子物理与原子核物理]