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目的了解广州市天然γ辐射、空气中氡浓度及食物中天然放射性核素水平,估算其所致公众照射剂量。方法分别采用FD-71A闪烁辐射仪、CR-39α固体径迹探测器、CANBRRA HPGeγ能谱仪测量了广州市室内外天然γ辐射、氡浓度水平及食物中天然放射性核素含量,根据结果计算了所致公众年有效剂量当量。结果室内外天然辐射所致公众人均年有效剂量当量为3.018 mSv/a,所致公众集体年有效剂量当量为2.189×104(man.Sv/a)。结论广州市天然辐射属正常天然本底水平。
Objective To understand the natural gamma radiation, radon concentration in air and the level of natural radionuclides in food in Guangzhou, and estimate the dose of public exposure. Methods The indoor and outdoor natural γ radiation, radon concentration and natural radionuclide content of food in Guangzhou were measured by FD-71A scintillation detector, CR-39α solid track detector and CANBRRA HPGe γ spectrometer respectively. Based on the results, Public annual effective dose equivalent. Results The average annual effective dose equivalent of 3.018 mSv / a caused by natural and indoor radiation was 2.189 × 104 (man.Sv/a). Conclusion Natural radiation in Guangzhou is normal natural background.