摘要：Graphical abstractDisplay OmittedAbstractIn this study, a well calibrated Super-Spec (RS-125) gamma spectrometer was used to measure the activity concentrations of40K,238U,232Thand gamma doses rate at 1 m above the ground level over a granite mining field in Asa, Kwara State, North-central Nigeria. Measurements were carried out in 50 randomly selected sample points. The overall mean activity concentrations of40K,238U,232Thand gamma dose are 570.91, 42.86, 18.15Bqkg−1, and 60.11nGyh−1respectively. The results of the activity concentrations were used to estimate the corresponding radiation hazard parameters to assess the suitability of the granite for building and construction purposes. The data in this study could serve as the baseline radiological data of the region for future references.•Activity concentrations of40K,238U,232Thand gamma doses were measured over a granite mining field in Asa.•The total mean activity concentrations of the radioisotopes and gamma dose are 570.91, 42.86, 18.15Bqkg−1, and 60.11nGyh−1respectively.•The radiological hazards are higher than the recommended permissible limits.
关键词：Radioactivity;Radiological risk assessment;Granite mining field;Super-Spec RS-125;Construction purposes;North Central Nigeria
