Vondrak滤波在能谱光滑中的应用研究

提出基于Vondrak滤波的能谱光滑算法,并构建光滑效果评价指标。使用溴化铈探测器获取了^(152)Eu、^(232)Th的γ能谱,分别将平均移动法、重心法、多项式最小二乘拟合法和Vondrak滤波法用于γ能谱的谱光滑处理。结果表明,相较于平均移动法,重心法、多项式最小二乘拟合法和Vondrak滤波法对能谱中统计涨落的抑制更加彻底,同时对能谱的特征信息可以进行较好的保持,是一种更优的谱光滑方法。

An energy spectrum smoothing algorithm based on Vondrak filter is proposed,and the evaluation index of smoothing effect is constructed.Theγ-ray spectra of ^(152)Eu and ^(232)Th were obtained by using cerium bromide detector,and the average shift method,gravity center method,polynomial least square fitting method and Vondrak filtering method were used to smooth theγ-energy spectra.The results show that,compared with the average shift method,the center of gravity method and the polynomial least square fitting method,the Vondrak filtering method can suppress the statistical fluctuation of the energy spectrum more thoroughly,and the characteristic information of the energy spectrum can be better preserved,so it is a better spectral smoothing method.