基于数值积分的无源效率算法的研究  

Implementation of a Source-less Efficiency Calibration Algorithm Based on Numerical Integration

作　　者：唐晓 赵崑 TANG Xiao;ZHAO Kun(Nuctech Company Limited,Beijing 100084,China)

机构地区：[1]同方威视技术股份有限公司,北京100084

出　　处：《核电子学与探测技术》2024年第2期239-244,共6页Nuclear Electronics & Detection Technology

摘　　要：无源效率算法是在蒙特卡罗算法基础上发展出来的探测器效率刻度方法,是一种相对有源效率刻度方法,具有安全方便的优势。基于蒙特卡罗方法计算高纯锗探测器的探测效率需要跟踪光子全寿命,计算效率低下,耗时长。针对上述问题,本文研究并测试了一种新型的无源效率算法,通过对探测器效率的空间分布进行数值积分,在保证效率刻度偏差绝对值相对于直接模拟的结果不高于10%的基础上,将单次效率刻度运算时间从直接模拟的180 s降低至10 s以内,实现高纯锗探测器刻度效率的提高。Directly using the Monte Carlo program to simulate the source-less efficiency of HPGe detectors takes long time to run.This paper studies and tests a source-less efficiency algorithm based on numerical integration,which can be applied to the source-less efficiency calibration of point sources and volume sources.On the basis of ensuring that the efficiency calibration deviation is not more than 10%,the single efficiency calibration operation time is reduced from approximately 180 seconds when directly simulated to less than 10 seconds,achieve a breakthrough in the calibration efficiency of HPGe detectors.

关 键 词：无源效率刻度 高纯锗探测器 数值积分 

分 类 号：X826[环境科学与工程—环境工程]