环境电离辐射体源标准空气比释动能率的确定

介绍了用实测法和MC理论计算法确定"放射性模型体源"表面中心点上方不同高度的比释动能率的方法和研究成果.研究结果表明,实测和理论计算结果的一致性较好,不存在明显的系统差.由此首次拟合出了能客观反映我国环境电离辐射体源标准的单位核素含量空气比释动能率的贝可法换算系数,提高了采用贝可法确定模型体源空气比释动能率的准确度.

Study on Certification of Air Kerma Rate of Body Source Standard for Environmental Ionizing Radiation

This paper introduces the methods and the results of determining the air kerma rate at different heights above the central point on the surface of radiactivity body source used by the experimental measurement methods and the Monte Carlo theoretical analog computation method.The results of this study show that the certifications of both the experimental measurements and the theoretical analog computation have a better consistency and have no distinctive systematic difference.Based on the above results,the reduction coefficient of Becquerel method is fitted in the first time,which can reflect objectively the air kerma rate per radionuclide concentration unit above China's body source standard for environmental ionizing radiation.So the accuracy of the air kerma rate above pad body source by Becquerel method is improved.