Dosimetry and Calorimetry Performance of a Scientific CMOS Camera for Environmental Monitoring.
Dosimetry and Calorimetry Performance of a Scientific CMOS Camera for Environmental Monitoring.
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DOI：
10.3390/s20205746
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发表时间：
2020-10-10
期刊：
影响因子：
--
通讯作者：
Walding J
中科院分区：
文献类型：
--
作者：
Aguilar-Arevalo A;Bertou X;Canet C;Cruz-Pérez MA;Deisting A;Dias A;D'Olivo JC;Favela-Pérez F;Garcés EA;González Muñoz A;Guerra-Pulido JO;Mancera-Alejandrez J;Marín-Lámbarri DJ;Martinez Montero M;Monroe J;Paling S;Peeters SJM;Scovell P;Türkoğlu C;Vázquez-Jáuregui E;Walding J
本文探讨了 CMOS 设备使用量热法测定饮用水中铅的前景。铅与微量放射性同位素一起出现，例如，衰变时产生能量从 10 到几百的放射物；该范围可以在硅传感器中检测到。在本文中，我们测试了 CMOS 相机（Oxford Instruments Neo 5.5）作为 X 射线和低能射线探测器的一般性能，并评估了其相对于世界卫生组织规定的饮用水中铅上限的灵敏度。检查 6 到 60 的能量。 CMOS 相机在此范围内具有线性能量响应，其能量分辨率大部分略优于 2%。 Neo sCMOS 对能量低于 的 X 射线不敏感。最小可检测率是 ，对应于芯片上的事件活动。根据检测到的活动对事件活动灵敏度的估计依赖于几何可接受性和测量的效率与能量的关系。我们报告的效率测量结果为 ( ) 处的 0.08(2)% (0.0011(2)%)。考虑到量热信息，我们测量 ( ) 射线的最小可检测率 ( )，其对应于 ( ) 的入射活动。 Toy Monte Carlo 和 Geant4 模拟与这些结果一致。这些结果表明，该 CMOS 传感器非常适合用作 X 射线探测器，其对样品的灵敏度为几到 100 ppb 水平。
This paper explores the prospect of CMOS devices to assay lead in drinking water, using calorimetry. Lead occurs together with traces of radioisotopes, e.g., , producing -emissions with energies ranging from 10 to several 100 when they decay; this range is detectable in silicon sensors. In this paper we test a CMOS camera (Oxford Instruments Neo 5.5) for its general performance as a detector of X-rays and low energy -rays and assess its sensitivity relative to the World Health Organization upper limit on lead in drinking water. Energies from 6 to 60 are examined. The CMOS camera has a linear energy response over this range and its energy resolution is for the most part slightly better than 2%. The Neo sCMOS is not sensitive to X-rays with energies below . The smallest detectable rate is , corresponding to an incident activity on the chip of . The estimation of the incident activity sensitivity from the detected activity relies on geometric acceptance and the measured efficiency vs. energy. We report the efficiency measurement, which is 0.08(2)% (0.0011(2)%) at ( ). Taking calorimetric information into account we measure a minimal detectable rate of ( ) for ( ) -rays, which corresponds to an incident activity of ( ). Toy Monte Carlo and Geant4 simulations agree with these results. These results show this CMOS sensor is well-suited as a - and X-ray detector with sensitivity at the few to 100 ppb level for in a sample.
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DOI：
10.1016/s0168-9002(97)00048-x
发表时间：
1997-04-11
影响因子：
1.4
作者：
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通讯作者：
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DOI：
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发表时间：
2016-11-01
影响因子：
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影响因子：
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作者：
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作者：
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