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设计了一种用于低放水体总α、总β在线监测系统的叠层探测器。该探测器选择CsI(Tl)无机闪烁体耦合塑料闪烁体而成的复合型闪烁体作为α/β射线探测回路,选择板形塑料闪烁体作为γ射线探测回路,两探测回路以叠层结构设计,以此来衡量γ射线对β射线计数的影响。实验测试结果表明:该叠层探测器α/β路本底计数率为389.1 s-1,γ路本底计数率为703.4 s-1,利用90Sr-90Y放射源进行β射线探测效率测量,探测效率为92.09%,最小可探测活度为9.57 Bq。
Abstract：A stacked detector was designed for the on-line monitoring system of total α and total β of low radioactive water.The detector selects a composite scintillator composed of CsI(Tl) inorganic scintillators coupled with plastic scintillators as the α/β detection loop and a plate-shaped plastic scintillator as the γdetection loop.The two detection loops are designed as stacked structures to measure the effect of γ on βcounting.The experimental results show that:the stacked detector has a background counting rate of389.1 s-1 for the α/β and 703.4 s-1 for the γ.The β detection efficiency was measured using a 90Sr-90Y radioactive source with a detection efficiency of 92.09% and a minimum detectable activity of 9.57 Bq.
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基本信息:
DOI：
中图分类号:TL816.2
引用信息:
[1]于万瑭,赵艳辉,高波,等.低放水体总α、总β在线监测系统叠层探测器设计[J].核电子学与探测技术,2022,42(05):835-839.
基金信息:
湖南省教育厅科学研究项目(20C1590); 湖南省自然科学基金(19A431)资助