Alonso-Hernández C M, Toledo-Sibello A L, Guillén-Arruebarrena A, Sibello-Hernández R, Morera-Gómez Y, Cartas-Águila H A
Centro de Estudios Ambientales de Cienfuegos, AP5, Ciudad Nuclear, Cienfuegos, Cuba.
Radiat Prot Dosimetry. 2019 Jul 1;184(1):5-11. doi: 10.1093/rpd/ncy178.
The natural radioactivity and the associated radiation hazards of soils from the Cumanayagua Granitoide-Granitic massif in the central south of Cuba have been studied. Mass activities of the natural radionuclides 238U, 232Th and 40K varied in the ranges 10.4-33, 4.6-21.7 and 381-1201 Bq kg-1, respectively. The radium equivalent activity (91.4 ± 22.1 Bq kg-1), absorbed dose rate (45.6 ± 11.1 nGy h-1), annual effective dose rate (56.1 ± 13.7 μSv y-1) and the external hazard index (0.25 ± 0.06) have been calculated and compared with the internationally approved values. According to these results, the area can be regarded as an area with normal natural background radiation and may not pose radiological risks to the inhabitants owing to harmful effects of ionizing radiation from the natural radionuclides in soils. This study provides background radioactivity concentrations in Cumanayagua Granitoide area and generate a baseline data for radiological mapping of Cuba in the future.
对古巴中南部库马纳亚瓜花岗岩-花岗质地块土壤的天然放射性及相关辐射危害进行了研究。天然放射性核素238U、232Th和40K的质量活度分别在10.4 - 33、4.6 - 21.7和381 - 1201 Bq kg-1范围内变化。已计算出镭当量活度（91.4±22.1 Bq kg-1）、吸收剂量率（45.6±11.1 nGy h-1）、年有效剂量率（56.1±13.7 μSv y-1）和外照射危害指数（0.25±0.06），并与国际认可值进行了比较。根据这些结果，该区域可被视为天然本底辐射正常的区域，土壤中天然放射性核素产生的电离辐射有害影响可能不会对居民构成辐射风险。本研究提供了库马纳亚瓜花岗岩区域的本底放射性浓度，并为未来古巴的放射性测绘生成了基线数据。
