A Model for Remote Depth Estimation of Buried Radioactive Wastes Using CdZnTe Detector.

A Model for Remote Depth Estimation of Buried Radioactive Wastes Using CdZnTe Detector.
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DOI:
10.3390/s18051612
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发表时间:
2018-05-18
期刊:
Sensors (Basel, Switzerland)
影响因子:
--
通讯作者:
Gamage KAA
Gamage KAA
中科院分区:
其他
文献类型:
--
作者:
Ukaegbu IK;Gamage KAA

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本文介绍了利用碲化镉锌(CZT)探测器对埋地放射性废物进行远程深度估计的衰减模型的结果。先前使用有机液体闪烁体探测器系统进行的研究表明,该模型能够估计埋在沙子中12厘米深的329-kBq Cs-137放射源的深度,平均计数率为100 cps。结果表明,使用CZT探测器可将同一放射源在沙子中的最大探测深度扩展到18 cm,平均计数率显著降低,为14 cps。此外,该模型还成功地估计了埋在沙子中3cm深处的9-kBq Co-60源的深度。这证实了这种远程深度估计方法可用于其他放射性核素和活性极低的废物。最后,本文提出了一个性能参数,用于评估采用该方法的辐射探测系统。
This paper presents the results of an attenuation model for remote depth estimation of buried radioactive wastes using a Cadmium Zinc Telluride (CZT) detector. Previous research using an organic liquid scintillator detector system showed that the model is able to estimate the depth of a 329-kBq Cs-137 radioactive source buried up to 12 cm in sand with an average count rate of 100 cps. The results presented in this paper showed that the use of the CZT detector extended the maximum detectable depth of the same radioactive source to 18 cm in sand with a significantly lower average count rate of 14 cps. Furthermore, the model also successfully estimated the depth of a 9-kBq Co-60 source buried up to 3 cm in sand. This confirms that this remote depth estimation method can be used with other radionuclides and wastes with very low activity. Finally, the paper proposes a performance parameter for evaluating radiation detection systems that implement this remote depth estimation method.
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