原子能科学技术2018，Vol.52Issue(6)：1113-1117,5.DOI:10.7538/yzk.2017.youxian.0468
活性炭盒测氡析出率探测效率校准方法研究
Study on Calibration Method for Detection Efficiency of Radon Exhalation Rate by Activated Charcoal Canister
摘要
Abstract
Measuring radon exhalation rate from materials surface by activated charcoal canister is a common method at home and abroad.In this method,the detection efficien-cy of activated charcoal canister is essential but difficult to be determined because of the lack of ready-made instruments.A new method was presented to calibrate the detection efficiency by avoiding determining the radon activity of activated charcoal canister.By means of radon activity released from activated charcoal canister and the net γ-ray count-ing rates of this canister before and after exposure,the equation of detection efficiency was derived and the corresponding calibration method was designed.Using this method,the detection efficiency of activated charcoal canister with diameter of 63 mm and height of 32 mm was calibrated for 5 times,and the average result is 6.57％± 0.26％.Monte Carlo method was used to simulate the above-mentioned activated charcoal canister.The simulation result of detection efficiency is 6.92％,which is in agreement with the result of experiments by the proposed method with error of 5％.The above results show that the presented method is accurate and reliable.关键词
氡/γ能谱仪/活性炭盒/探测效率Key words
radon/γ-ray spectrometer/activated charcoal canister/detection efficiency分类
天文与地球科学引用本文复制引用
李承文,乐仁昌,陈林..活性炭盒测氡析出率探测效率校准方法研究[J].原子能科学技术,2018,52(6):1113-1117,5.基金项目
福建省自然科学基金资助项目(2017J01554) （2017J01554）
