γ能谱分析中马林杯体源几何修正  

Geometric Correction of Marinelli BeakerSource in Gamma Spectrometry

作　　者：许丰 於国兵 徐平 顾先宝 何旭 郭建友[1] XU Feng;YU Guo-bing;XU Ping;GU Xian-bao;HE Xu;GUO Jian-you(School of Physics and Material Science,Anhui University,Hefei 230601,China;Anhui Radiation Environment Supervision Station,Heifei 230071,China;School of Nuclear Science and Technology,University of Science and Technology of China,Hefei 230026,China)

机构地区：[1]安徽大学物理与材料科学学院,合肥230601 [2]安徽省辐射环境监督站,合肥230071 [3]中国科学技术大学核科学技术学院,合肥230026

出　　处：《核电子学与探测技术》2021年第6期1074-1079,共6页Nuclear Electronics & Detection Technology

基　　金：国家自然科学基金(11935001)资助。

摘　　要：针对马林杯中待测样品与标准样品的几何高度会导致测量结果出现偏差的问题,使用LabSOCS软件建立仿真实验室,基于同轴型HPGe探测器对不同高度马林杯体源进行几何修正。根据模拟计算结果得到一定能量区间几何修正系数与高度的函数关系,并且从实验上验证了该函数关系的可靠性。实验结果表明该组公式适用于该范围内马林杯体源几何修正,可进一步提高放射性活度测量工作的准确性。The different heights between the sample and the standard source in Marinelli beaker geometry will result in incorrect measurement data.To solve this problem,we did the research on geometric correction of Marinelli beaker source was conducted.Based on the relative detection efficiency of 35%〜70%coaxial HPGe detectors,LabSOCS software was used to calculate the full energy peak efficiency for a group of water samples with different heights in Marinelli beaker geometry.Then geometrical factors were calculated.According to the calculation results,a set of proper function,considering different energy range,has been fitted to the simulation results to obtain the correction function.Last,a set of experiments were conducted to verified the reliability of the function.A good agreement between the experiments and functions had been shown.Using these functions can improve the correction of samples radioactive in environmental monitoring.

关 键 词：马林杯 几何修正 LabSOCS 

分 类 号：TL81[核科学技术—核技术及应用]