基于点源^(133)Ba刻度^(131)I探测效率的面积加权法  

The Calibration Method of ^(131)I Detecting Efficiecncy Based on Area Weight for ^(133)Ba Standard Point Source

作　　者：周银行[1] 林青川[1] 郭洪波[1] 邢世雄[1] 

机构地区：[1]中国工程物理研究院核物理与化学研究所,四川绵阳621900

出　　处：《核电子学与探测技术》2009年第6期1353-1355,1420,共4页Nuclear Electronics & Detection Technology

摘　　要：介绍了利用133Ba点源的γ能峰(与131I的γ能量相近)通过面积加权法对NaI(Tl)探测器模拟刻度碘盒中的131I探测效率的原理和方法。其模拟刻度结果与标准刻度方法效率(133Ba和131I碘盒标准源刻度探测效率)进行了比较,其相对误差分别为7.15%和1.34%。研究表明,133Ba点源面积加权法刻度NaI(Tl)探测器对碘盒中的131I探测效率是一种简便而可靠的方法。The principle and technique of the calibration of 131I detecting efficiecncy in Iodin-box based on area weight for 133Ba standard point source is introduced. The calibration result is compared to the efficiecncy acquired by standard calibration menthod, the relative errors are 7.15% and 1.34%. The results shows it is a simple and credible method that using 133Ba standard point source calibrate the 131I detecting efficiecncy in Iodin box based on area weight method.

关 键 词：NAI(TL)探测器 碘盒 131I 133Ba 探测效率 

分 类 号：TL822[核科学技术—核技术及应用] O242[理学—计算数学]