【摘要】 利用γ能谱仪对阿坝州壤塘地区的天然放射性核素进行了现场测量,计算了内、外照射指数、γ照射量率和γ外照射有效剂量,并对该地区进行了天然放射性水平评价。研究结果显示,该地区γ照射量率平均值(100.07Gy/h),高于全国(81.5nGy/h)和世界(80nGy/h)的平均值,但内、外照射指数、γ照射量率和γ外照射有效剂量都在国家限量标准控制的范围内。由于地表水对放射性元素具有富集和运移作用,所以在断裂带附近的放射性水平相对偏高。目前,壤塘地区的天然放射性水平在安全的范围内,适合人类的居住和生活。更多还原

【Abstract】 EDS was used for spot measurement of natural radionuclide in Rangtang of Aba.The authors calculate internal / external exposure index,γ-ray exposure rate and γ-ray external exposure,and appraise the natural radioactive environment of the region.The results showed that γ-ray exposure rate was higher than the average of the country(100.07Gy/h)and the world(80Gy/h)in the region.But internal / external exposure index,γ-ray exposure rate and γ-ray external exposure were in the range of the country control limits.Enrichment of surface water and transport of radioactive elements in the role of the soil pool area have an impact on the level of radioactivity.And the fault zone near the relatively high level of radioactivity.Rangtang natural radioactivity level of the region is still in a safe range,suitable for human living and life.更多还原