Abstract: The long-lived radionuclides in 34 groups of aerosol samples collected in Beijing for nearly four years were studied through low-background γ-spectrometer at the China Jinping Underground Laboratory (CJPL). Radioactivity of the nuclides ²³⁸U, ²²⁶Ra, ²¹⁰Pb, ²³²Th, ²²⁸Ra, ⁴⁰K, ⁷Be, ¹³⁷Cs were measured and their mean values were 17.47 μBq·m^-3, 21.19 μBq·m^-3, 2.39 mBq·m^-3, 11.12 μBq·m^-3, 14.43 μBq·m^-3, 226.64 μBq·m^-3, 6.98 mBq·m^-3, 2.36 μBq·m^-3 , which are within the range of background. Meanwhile, there were moderate correlations between the activity concentrations of radionuclides and environmental parameters. The values of ⁷Be, ⁴⁰K, ¹³⁷Cs and ²²⁶Ra were negatively correlated to the seasons, and ²¹⁰Pb oppositely; the value of ⁴⁰K was positively correlated to AQI.

Key words: aerosol, γ-spectrometry analysis, radionuclide