海水中^(40)K的γ能谱分析方法  

γ-spectrum analysis of ^(40)K in seawater

作　　者：魏计房[1,2] 邓春梅 张馨星[1,2] 王荣元 王伟[1,2] 杨朋金 张蒙蒙[1,2] WEI Ji-fang;DENG Chun-mei;ZHANG Xin-xing;WANG Rong-yuan;WANG Wei;YANG Peng-jin;ZHANG 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)

机构地区：[1]国家海洋局北海环境监测中心,山东青岛266033 [2]山东省海洋生态环境与防灾减灾重点实验室,山东青岛266033

出　　处：《海洋环境科学》2018年第3期438-443,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)

摘　　要：利用高纯锗γ谱仪对海水中的^(40)K含量进行了直接测量。基于LabSOCS无源效率刻度技术,得出最大探测效率对应的样品最佳几何外形和参数,使得海水样品中的^(40)K含量分析在3 h内便可以完成且样品净计数的相对标准误差小于10%。同其他分析方法相比,γ能谱分析法影响因素少、无需任何前处理且测量过程简单,因此在海洋辐射环境本底调查工作中作为一种替代方法值得推广。The concentration of 40 K in seawater was measured directly by HPGe γ spectrometer. Based on the LabSOCS software,the maximum detection efficiency corresponding to the optimal geometric shape and parameters was calculated,as a result,the analysis of the concentration of 40 K in seawater can be finished in 3 hours with relative standard deviation less than 10% for sample net count. Compared with other methods,γ-spectrum analysis has few influencing factors,and it does not need any pretreatment process which is very convenient. Therefore,the γ-spectrum analysis is worth promoting as an alternative method in environmental radiological baseline study.

关 键 词：海水 钾-40 Γ能谱 LabSOCS 探测效率 

分 类 号：X830.2[环境科学与工程—环境工程]