ABSTRACT

The paper herein is intended to present the registration efficiency of 300A alpha-scintillation active cell and its application in the field of soil radon detection. In this work, a radon chamber based on a natural radon source has been constructed. This chamber allows calibration of the active scintillation cell under flow-through condition. Radon source has been designed, constructed, and the radon concentration output has been measured. It has been observed that a steady radon concentration can be obtained inside the chamber after a period longer than 30 days. The steady radon concentration inside the chamber is equal to 123.58 Bq/m³. It is found that the registration efficiency and the sensitivity of the cell are equal to 0.69 and 1.243 CPM/pCi/l, respectively. After determining the calibration parameters of the cell, soil radon gas survey was carried out in the university city of Najran. It is found that the average radon activity concentration in the tested area is equal to 1332 ± 66 Bq/m³. Results of sensitivity and efficiency evaluation, along with radon measurements, are addressed and thoroughly discussed.

摘要

本文旨在介绍300Aα闪烁活性细胞的配准效率及其在土壤ra检测领域中的应用。在这项工作中，已经建立了基于天然ra源的ra室。该腔室可在流通条件下校准主动闪烁池。已设计，构造了source源，并测量了concentration浓度输出。已经观察到，经过超过30天的时间，可以在室内获得稳定的ra浓度。室内稳定的ra浓度等于123.58 Bq / m ³。发现细胞的配准效率和灵敏度分别等于0.69和1.243 CPM / pCi / 1。确定电池的校准参数后，在大学城纳吉兰进行了土壤ra气调查。发现测试区域中的平均ra活度浓度等于1332±66Bq / m ³。灵敏度和效率评估的结果，以及measurements测量，都得到了解决和彻底讨论。