一种确定活性碳取样滤盒中^(131)Ⅰ活度的新方法  

A New Methord of Activation Analysis of ^(131)Ⅰ in Charcoal Cartridge Sampler

作　　者：赖财锋[1,2] 徐家云[1] 秦建国[2] 王大伦[2] 

机构地区：[1]四川大学物理科学与技术学院,成都610064 [2]中国工程物理研究院核物理与化学研究所,绵阳621900

出　　处：《核电子学与探测技术》2011年第8期867-870,共4页Nuclear Electronics & Detection Technology

摘　　要：代替传统的通过效率刻度测量131Ⅰ活度的方法,借助于MCNP5模拟和求解病态矩阵方程得出131Ⅰ在取样滤盒中的深度分布和总活度。该方法稳定性良好,无需制备标准样品和效率刻度,有利于快速准确地监测131Ⅰ的排放;可以给出深度分布,有助于了解131Ⅰ在取样盒中的物理进程。Instead of the traditional methord for measuring 131Ⅰ activation by calibrating the detecting efficiency,MCNP5 caculation and ill-posed equation solution were used in a new methord for analysing 131Ⅰ activation and depth distribution in sample box.Because of no necessary to prepare for standard sample and calibrate the efficiency,it makes the survey of 131I more quickly and accurately and is able to take into account the physics processes of 131Ⅰ in the sample box.

关 键 词：131Ⅰ活度 深度分布 病态矩阵 吉洪诺夫正则化 

分 类 号：TL822[核科学技术—核技术及应用]