以高纯锗伽马能谱分析仪测量了准东煤矿开采区土壤中放射性核素(238)U、-(232)Th、-(226)Ra和-(40)K的比活度,测量值分别为24.53(13.82-36.71)Bq/kg、33.29(20.34-47.76)Bq/kg、48.7(27.98-72.64)Bq/kg和700.31(560.29-866.95)Bq/kg。将其同新疆及昌吉州的平均放射比活度进行了比较,并计算了距地面1 m高处空气中γ辐射吸收剂量率和年有效剂量率,最后对γ辐射外照射水平进行了评价。评价结果表明,准东煤矿开采区土壤中天然放射性水平处于正常范围内。
This paper compares the specific radioactivity of radionuclides 238U, 232Th, 226Ra and 40K in soil in the mining area of Zhundong Coal Mine measured via HPGe γ- ray spectrometer, with measured values of 24.53 (13.82 - 36. 71) Bq/kg, 33.29 (20.34-47.76) Bq/kg, 48.7 (27.98-72.64) Bq/kg and 700.31 (560.29-866.95) Bq/kg respectively, with the average specific radioactivity in Xinjiang and Changji, and calculates the γ radiation absorbed dose rate and annual effective dose rate at a height of 1 m above the ground, finally evaluates the external γ irradiation. The results show that the natural radioactivity in soil in the mining area of Zhundong Coal Mine is in normal range.