Gross beta determination in drinking water using scintillating fiber array detector

被引：7
作者：
Lv, Wen-Hui [1 ,2 ,3 ]
Yi, Hong-Chang [1 ,2 ]
Liu, Tong-Qing [1 ,2 ]
Zeng, Zhi [1 ,2 ]
Li, Jun-Li [1 ,2 ]
Zhang, Hui [1 ,2 ]
Ma, Hao [1 ,2 ]
机构：
[1] Tsinghua Univ, Minist Educ, Key Lab Particle & Radiat Imaging, Beijing 100084, Peoples R China
[2] Tsinghua Univ, Dept Engn Phys, Beijing 100084, Peoples R China
[3] Xian Res Inst Hitech, Xian 710025, Shaanxi, Peoples R China
来源：
APPLIED RADIATION AND ISOTOPES | 2018年 / 137卷
关键词：
Scintillating fiber; Gross beta counting; Drinking water;
D O I：
10.1016/j.apradiso.2018.04.007
中图分类号：
O61 [无机化学];
学科分类号：
070301 ; 081704 ;
摘要：
A scintillating fiber array detector for measuring gross beta counting is developed to monitor the real-time radioactivity in drinking water. The detector, placed in a stainless-steel tank, consists of 1096 scintillating fibers, both sides of which are connected to a photomultiplier tube. The detector parameters, including working voltage, background counting rate and stability, are tested, and the detection efficiency is calibrated using standard potassium chloride solution. Water samples are measured with the detector and the results are compared with those by evaporation method. The results show consistency with those by evaporation method. The background counting rate of the detector is 38.131 +/- 0.005 cps, and the detection efficiency for beta particles is 0.37 +/- 0.01 cps/(Bq/1). The MDAC of this system can be less than 1.0 Bq/l for beta particles in 120 min without pre-concentration.
引用
收藏
页码：161 / 166
页数：6
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