摘要
基于实验室无源效率刻度技术LabSOCS,分别从样品源基质成分、相对探测器几何位置、质量和密度四个方面开展了海水中^(137)Cs的γ能谱测定过程中的效率刻度研究。结果表明,样品源基质成分和相对几何位置的差异对探测器探测效率的影响可以忽略。探测效率与样品源质量和密度的关系则采用统一的二元二次多项式进行描述,复相关系数高达0.99946。研究结果为海水中^(137)Cs活度浓度的γ能谱测定提供了理论基础。
Based on the LabSOCS software,studies on the detector efficiency calibration of the 137Csγ-spectrum analysis in the seawater were performed under different aspects of sample compositions,relative geometric positions to the detector,masses and densities.The results revealed that the effects brought by sample compositions and relative positions to the detection efficiency could be ignored.A unit duality quadratic polynomial was employed to describe the relationship between detection efficiency and sample mass as well as density,and the result showed that the multiple correlation coefficient could reach as high as 0.99946.These results have replenished theoretical basis for the 137Csγ-spectrum analysis in the seawater.
作者
魏计房
王荣元
王伟
张馨星
邓春梅
姚海燕
丁凯
张蒙蒙
WEI Ji-fang;WANG Rong-yuan;WANG Wei;ZHANG Xin-xing;DENG Chun-mei;YAO Hai-yan;DING Kai;ZHANH Meng-meng(North China Sea Environmental Monitoring Center,State Oceanic Administration,Qingdao 266033,China;Shandong Province Key Laboratory of Marine Ecological Environment and Disaster Prevention and Mitigation,Qingdao 266033,China)
出处
《海洋环境科学》
CAS
CSCD
北大核心
2019年第3期342-346,352,共6页
Marine Environmental Science
基金
海洋公益性项目"核电临近海域海洋放射性风险评估与管理技术的研究及应用"(201505005)
