有源效率曲线拟合γ谱法快速测定水产品中^(137)Cs  

Source Efficiency Curve Fitting Method Using γ Spectrometer for Rapid Determination of ^(137)Cs in Marine Products

作　　者：马嫱[1,2] 陈勇飞[3] 蔡继杰[3] MA Qiang CHEN Yong - fei CAI Ji - jie(Xiamen University Tan Kah Kee College, Zhangzhou 363105, China Key Laboratory of Ecological Security and Environmental Health, Fujian Province University, Zhangzhou 363105, China Xiamen Entry -Exit Inspection and Quarantine Bureau, Xiamen 361026, China)

机构地区：[1]厦门大学嘉庚学院,福建漳州363105 [2]河口生态安全与环境健康福建省高校重点实验室,福建漳州363105 [3]厦门出入境检验检疫局,福建厦门361026

出　　处：《核电子学与探测技术》2016年第11期1126-1130,共5页Nuclear Electronics & Detection Technology

基　　金：龙海市科技局项目(2015KN09);厦门市科技局项目(3502Z20144075)资助

摘　　要：利用^(152)Eu作为刻度源对HPGe-γ谱仪进行效率刻度,拟合出效率曲线,实现对水产品鲜样中^(137)Cs进行快速测量,以满足水产品放射性污染状况评估的需要。研究结果表明,取样品可食部分绞碎后装满2 L马林杯,测量时间6 h的测量结果即可达到0.111 Bq·kg^(-1)鲜样,可以满足针对水产品放射性的食用安全评估的要求。利用此方法对台湾海峡西侧养殖水产品进行检测,部分鱼类中检出^(137)Cs,但含量很低,对人体健康不构成威胁。137Cs of fresh samples of marine products could be measured quickly using HPGe -γ spectrometer. 152Eu was used as a calibration source to carry out the efficiency calibration of HPGe - γ spectrometer and get the fitting the efficiency curve which can meet the needs of the assessment of radioactive contamination of marine products. The results showed that the samples of edible part filled with minced Marlin 2 L cup and 6 h measurement time can reach 0.1 1 1 Bq/kg fresh sample. This can meet the food safety assessment for the marine products. Using this method on the marine products on the west side of the Taiwan Strait and some fish were detec- ted out of 137Cs. But the content was very low which does not pose a threat to human health.

关 键 词：有源效率曲线 水产品 137Cs HPGe-γ谱仪 

分 类 号：TL817[核科学技术—核技术及应用]