Isinkaye M O, Shitta M B O
Department of Physics, University of Ado Ekiti, PMB 5363, Ado Ekiti, Nigeria.
Radiat Prot Dosimetry. 2010 Jun;139(4):590-6. doi: 10.1093/rpd/ncp284. Epub 2009 Dec 30.
Clay soil samples collected from different sites in Ekiti State, southwestern Nigeria were analysed for their natural radionuclide contents, using the gamma ray spectrometric method. The overall mean activity concentrations of (226)Ra, (232)Th and (40)K obtained in this study were, respectively, 33.6 +/- 5.3, 20.1 +/- 3.3 and 207.2 +/- 113.0 Bq kg(-1). The radiological hazards incurred from the use of the clay soil as a component of building materials were estimated through various radiation hazard indices. The results indicate that the values obtained fall below the internationally accepted maximum limits and as such, the use of clay as a building material does not pose any significant radiation hazard to individuals in the study area.
采用伽马射线能谱法对从尼日利亚西南部埃基蒂州不同地点采集的粘土土壤样本进行了天然放射性核素含量分析。本研究获得的镭-226、钍-232和钾-40的总体平均活度浓度分别为33.6±5.3、20.1±3.3和207.2±113.0贝可勒尔每千克。通过各种辐射危害指数估算了将粘土用作建筑材料成分所产生的辐射危害。结果表明，所获得的值低于国际公认的最大限值，因此，在研究区域内，使用粘土作为建筑材料不会对个人造成任何重大辐射危害。
