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

摘要

This paper introduces the methods and the results of determining the air kerma rate at different heights abovethe central point on the surface of pad body source used by the experimental measurement methods and the Monte Carlotheoretical analog computation method. The results of this study show that the certifications of both the experimentalmeasurements and the theoretical analog computation have no distinctive systematic difference, which proves the betterconsistence of the two. Based on the above results, the reduction coefficient of Becquerel method was fitted the first time,which can reflect objectively the air kerma rate per radionuclide concentration unit above China’s body source standard forenvironmental ionizing radiation. So the accuracy of the air kerma rate above pad body source by Becquerel method wasimproved.