一种γ能谱光滑效果评价方法  

A Smoothing Effect Evaluation Method of γ Spectrum

作　　者：雷卫国[1,2] 王铁山[1] 冯天成[2] 贾明雁[2] 成智威[2] 雷震[2] 

机构地区：[1]兰州大学核科学与技术学院,兰州730000 [2]西北核技术研究所,西安710024

出　　处：《核电子学与探测技术》2012年第3期308-310,336,共4页Nuclear Electronics & Detection Technology

摘　　要：在γ能谱数据处理中需要对测量能谱进行光滑以降低统计涨落。实际应用中,针对不同的γ能谱,需要对各种能谱光滑算法的光滑效果进行科学的比较和评价,选择最佳的能谱光滑算法及最佳光滑参数。文章从γ能谱计数的统计涨落规律出发,提出了一种评价能谱光滑算法效果的方法,给出了评价参数,并计算了光滑效果的等效测量时间。根据实验测量的γ能谱数据,采用5点三次多项式拟合最小二乘法对不同光滑次数的光滑效果进行了对比,优选了光滑算法的光滑次数参数,并给出了等效测量时间,提高了谱数据处理的精度和准确度。In most situations, a smooth method is needed in ~, spectrum analysis to reduce the noise. It is necessary to compare the different smooth method to get the best one and optimize the parameters. The paper gave an evaluation method of γ spectrum smooth method, and calculated the equivalent measuring time of the smooth effect. The method was used to optimize the smooth method in smoothing measurement spectrum. The result shows that the method is useful in comparing different smooth methods and finding the best one to raise the precision and accuracy of analysis of γ spectrum.

关 键 词：γ能谱分析 能谱光滑 效果评价 多项式拟合 最小二乘法 

分 类 号：O571[理学—粒子物理与原子核物理]