采样方式对氡钍分析器校准结果的影响分析  

Analysis of the Influence of Sampling Methods on the Calibration Results of Radon Thorium Analyzers

作　　者：付勇明 刘惠伟 FU Yongming;LIU Huiwei

机构地区：[1]广东省计量科学研究院

出　　处：《计量与测试技术》2023年第7期69-71,共3页Metrology & Measurement Technique

摘　　要：本文根据《测氡仪检定规程》对氡钍分析器进行校准,使用标准氡室,闪烁室分别采用三种采样方式,测量得到其体积活度响应。当闪烁室内完全充满氡气时,其体积活度响应测量值应相当,与采样方式无关。而实际校准中,由于闪烁室未完全充满氡气和氡及其子体平衡被打破,造成体积活度响应值出现差异,因此,从大到小对应的采样方式依次为抽真空采样、连续循环采样和循环采样,且循环采样的理论值更接近理论值。In this paper,the volume activity response of the radon and thorium analyzer was measured by using three sampling methods in the standard radon chamber and scintillation chamber.When the scintillation chamber is completely filled with radon gas,the measured volume activity response should be equivalent,independent of the sampling method.However,in actual calibration,the scintillation chamber is not completely filled with radon gas and the balance of radon and its daughters is broken,resulting in differences in volume activity response values.Therefore,sampling methods corresponding to the largest to the smallest are vacuum sampling,continuous cyclic sampling and cyclic sampling,and the theoretical value of cyclic sampling is closer to the theoretical value.

关 键 词：氡钍分析器 氡室 采样方式 校准 

分 类 号：P315.7[天文地球—地震学]