Preliminary Study of ⁷Be,¹³⁷Cs and ¹³¹I Activity Concentration Distribution Rule in Beijing Aerosol

The process of aerosol sampling and measuring of Beijing Radionuclide Station and Beijing Radionuclide Laboratory of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) International Monitoring System (IMS) was described. Long time aerosol monitoring data of the station and the laboratory were analyzed through statistic method and the characteristic and rule of the concentration distribution of nuclides ⁷Be, ¹³⁷Cs and ¹³¹I were obtained. The foundation was formed for further studying the rule of the radionuclide distribution in atmosphere.