Distribution Characteristics of <sup><sup>7</sup></sup>Be and <sup><sup>210</sup></sup>Pb in Near-Surface Aerosols in Mianyang Area and Their Significance to O<sub>3</sub> Tracer

In order to understand the quality of radiation environment in near surface air Mianyang area, grasp trend its change, explore sources aerosol substances and their significance tracking concentration O3 ground, a detailed gamma spectrum analysis samples from March 2018 February 2019 Anzhou District, Jiangyou City, Zitong County Pingwu was carried out. general, activity 7Be is higher spring autumn, while it lowest summer. The annual average 1.90-2.13mBq/m3, which basically same as distribution characteristics inland, mid-latitude, low-altitude areas world. 210Pb "U" type feature throughout year. It late or early summer has an 1.24-1.66mBq/m3, relatively high value on global land. correlation between near-surface aerosols showed that were weakly positively correlated, ratio 7Be/210Pb significantly correlated with O3, O3 were negatively correlated; can be used good tracer air. source area greatly affected by vertical convection atmosphere.