Analytical study of Radionuclide and Radon Concentrations in Rock Samples Collected from Um-Bogma and its Radiological Hazard Impact

The HPGe detector was used to calculate the specific activity of natural radionuclides ²³⁸U, ²³²Th, and ⁴⁰K in rock samples obtained from the Um-Bogma area. Um-Bogma is divided into four regions: Abu Zarab, Sad Elbanat, Talet Selim, and Allouga. The dose rate and hazards parameters have been calculated. Concentration of ²²²Rn emanated (²²⁶Ra decaying) has been calculated using empirical formulae and compared with that measured using Solid State Nuclear Track Detector CR-39 (SSNTD). The average specific activity in Bqkg^-1(dry weight) for ²³⁸U, ²²⁶Ra, ²³²Th and ⁴⁰K were 396.3±3.3, 405.04±3.4, 61.45±1.3 and 377.2±5.8, respectively for Abu Zarab area, 1216.6±5.4, 1475.4±6.7, 61.8±1.3 and 359.2±6.1 Bqkg^-1, respectively for Talet Seleim area, 467.8±4.2, 408.41±3.5, 29.60±0.9 and 259.2±2.9 Bqkg^-1, respectively for Allouga area and 557.05±4.1, 491.78±3.9, 63.45±1.4 and 420.55±3.6 Bqkg^-1 respectively for Sad AlBanat area. The measured radon concentrations for the four regions were 4.95, 10.4, 4.6 and 3.9 Bq/m³. From the data obtained, it is found that the geological structure considered the main factor for the increase of radon concentration