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首页> 外文期刊>Health Physics: Official Journal of the Health Physics Society >A New Approach for the Determination of Dose Rate and Radioactivity for Detected Gamma Nuclides Using an Environmental Radiation Monitor Based on an NaI(Tl) Detector
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A New Approach for the Determination of Dose Rate and Radioactivity for Detected Gamma Nuclides Using an Environmental Radiation Monitor Based on an NaI(Tl) Detector

机译：一种新方法，用于使用基于NAI（TL）探测器的环境辐射监测器检测γ核素的剂量率和放射性的新方法

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摘要

To expand the application of dose rate spectroscopy to the environment, the method using an environmental radiation monitor (ERM) based on a 3" x 3" NaI(Tl) detector was used to perform real-time monitoring of the dose rate and radioactivity for detected gamma nuclides in the ground around an ERM. Full-energy absorption peaks in the energy spectrum for dose rate were first identified to calculate the individual dose rates of Bi-214, Ac-228, Tl-208, and K-40 distributed in the ground through interference correction because of the finite energy resolution of the NaI(Tl) detector used in an ERM. The radioactivity of the four natural radionuclides was then calculated from the in situ calibration factor-that is, the dose rate per unit curie-of the used ERM for the geometry of the ground in infinite half-space, which was theoretically estimated by Monte Carlo simulation. By an intercomparison using a portable HPGe and samples taken from the ground around an ERM, this method to calculate the dose rate and radioactivity of four nuclides using an ERM was experimentally verified and finally applied to remotely monitor them in real-time in the area in which the ERM had been installed.
机译：为了扩展剂量率光谱到环境的施加，使用基于3“×3”Nai（TL）检测器的环境辐射监测器（ERM）的方法来执行对剂量率和放射性的实时监测在ERM周围检测到地面上的伽马核苷酸。首先鉴定为剂量率的能谱中的全能量吸收峰，以通过干扰校正计算在地面中分布在地面中的双重214，AC-228，TL-208和K-40的个体剂量速率在ERM中使用的NAI（TL）探测器的分辨率。然后从原位校准因子计算四种天然放射性核素的放射性 - 即，每单位居里的剂量率为untemary的几何形状的每单位居住的uRIE yerm。由蒙特卡罗理论上估计模拟。通过使用便携式HPGE和从ERM围绕地面取出的样品，使用ERM计算四种核素的剂量率和放射性的方法进行实验验证，最后应用于远程监测它们在该区域的实时监测它们ERM已安装。

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