Dos Santos Júnior José Araújo, Dos Santos Amaral Romilton, do Nascimento Santos Josineide Marques, da Silva Arykerne Nascimento Casado, Rojas Lino Angel Valcárcel, Milan Marvic Ortueta, de Almeida Maciel Neto José, Bezerra Jairo Dias, Araújo Eduardo Eudes Nóbrega de
Grupo de Radioecologia, Departamento de Energia Nuclear do Centro de Tecnologia e Geociências da Universidade Federal de Pernambuco. Avenida Professor Luiz Freire, 1000, Cidade Universitária, Recife/PE, Brazil.
Centro de Aplicaciones Tecnológicas y Desarrollo Nuclear (CEADEN) Calle 30 # 502, La Habana, Cuba.
Radiat Prot Dosimetry. 2018 Dec 1;182(4):448-458. doi: 10.1093/rpd/ncy101.
Environmental radioactivity studies have been allowed establishing radiometric patterns in several area of the earth's crust. The work was conducted through radiometric analyses of regions with high levels of radionuclides and others with no history of anomalies. The research allowed establishing the radiometric profile of soils in the state of Pernambuco, Brazil, using a gamma spectrometry system. The specific activities ranged from 16.5 to 287.5 Bq kg-1 for 238U, 2.0 to 191.7 Bq kg-1 for 226Ra, 1.3 to 281.4 Bq kg-1 for 232Th and from 5.0 to 2600.9 Bq kg-1 for 40K. The results showed areas with low levels of ionizing radiation. However, for 40K some points presented high values, although non-representative of the number of samples investigated. The 226Ra/238U and 232Th/238U ratios allowed to determine the radioactive imbalance condition and to obtain information about aspects of soil availability providing an assessment of the dynamics of these radionuclides.
环境放射性研究已被用于在地球地壳的多个区域建立辐射测量模式。这项工作是通过对放射性核素含量高的地区和无异常历史的其他地区进行辐射测量分析来开展的。该研究利用伽马能谱系统确定了巴西伯南布哥州土壤的辐射测量剖面。238U的比活度范围为16.5至287.5 Bq kg-1，226Ra为2.0至191.7 Bq kg-1，232Th为1.3至281.4 Bq kg-1，40K为5.0至2600.9 Bq kg-1。结果显示了电离辐射水平较低的区域。然而，对于40K，一些点呈现出高值，尽管在所研究的样本数量中不具代表性。226Ra/238U和232Th/238U的比值有助于确定放射性不平衡状况，并获取有关土壤有效性方面的信息，从而对这些放射性核素的动态变化进行评估。
