NaI晶体谱仪采集X射线能谱测量方法研究  

Studies on the Bremsstrahlung X-Ray Energy Spectrum Reconstruction Using NaI Scintillation Detector

作　　者：张耀锋[1] 郭彬[2] 黄建微[2] 李耀刚[1] 王晓君[1] 

机构地区：[1]北京师范大学核科学与技术学院射线束技术与材料改性教育部重点实验室,北京100875 [2]中国计量科学研究院,北京100029

出　　处：《核电子学与探测技术》2015年第4期386-389,共4页Nuclear Electronics & Detection Technology

基　　金：中央高校基本科研业务费专项(项目编号:2013yb12)资助

摘　　要：为准确测量轫致辐射X射线能谱,利用NaI晶体谱仪对于测量光子的能谱展宽效应,结合理论模拟分析,提出了采用变能量矩阵求解法实现X射线能谱的重建。该方法通过合理选择能量区间,可有效消除能谱响应矩阵中各矢量的相关性,从而实现能谱的准确重建。并分别以均匀能谱分布和实际轫致辐射X射线能谱为例,进行了X射线的能谱重建。获得结果与原始能谱的相关性约为0.98。The matrix solving method with varying energy bin is employed to realize the construction of X -ray energy spectrum using the effect of energy - spectrum - widen and binding the theory analysis in this paper. For the matrix solving method, we can dispel the correlation of every vector in the matrix so as to achieving the ac- curate spectrum results through choosing suitable energy bins. Then, to test the matrix solving method, X - ray with uniform energy distribution and real bremsstrahlung X- ray were taken as the original incident source respectively, and the two constructed spectrum were achieved. The comparison results show that the matrix solving method is useful and the correlation parameter of the original spectrum and the constructed results is about 0.98.

关 键 词：轫致辐射 能谱测量 NaI晶体谱仪 变能量区间矩阵求解法 

分 类 号：TL503[核科学技术—核技术及应用]