氡析出率快速测量的不确定度评定

氡析出率测量受外界环境因素影响较大,为科学合理地评定氡析出率快速测量结果的准确性。结合不确定度原理,建立氡析出率快速测量方法的理论分析模型,分析其不确定度来源,评定其不确定度。结果表明,快速测量方法在氡析出率0.39-2.62 Bq·m~(-2)·s~(-1)的标准装置上,105 min快速测量的结果其相对合成标准不确定度在12%以内。研究结果为氡析出率快速测量方法的置信程度评定提出了新的评价方法。

Uncertainty evaluation of rapid measurement of radon exhalation rate

Background:Rapid measurement of radon exhalation rate is influenced strongly by external environmental factors.Purpose:This study aims to scientifically evaluate the accuracy of the measured result of radon exhalation rate according to the concept of uncertainty.Methods:A theoretical analytical model was estimated to study the measurement method of radon exhalation rate. The origin of the uncertainty was analyzed and employed to evaluate the accuracy of the result.Results: The result of the relative synthesis standard uncertainty diverges within 12% when the rapid measurement is applied on the standard device of the University of South China with a radon exhalation rate of 0.39?2.62 Bq·m?2·s?1 in 105 min.Conclusion:This study provides a new method to evaluate the rapid determination of radon exhalation standard device.