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Shayeb, Mohammad Abu,Baloch, Muzahir Ali Korean Nuclear Society 2020 Nuclear Engineering and Technology Vol.52 No.6
In the first study, the Radon emanation and radiological hazards associated with radionuclides in soil samples, collected from 9 various date palm farms located in 3 different districts in Saudi Arabia were determined through a high purity Germanium (HPGe) gamma-ray spectrometer. The estimated average values of Radon emanation coefficient and Radon mass exhalation rate for soil samples were 0.535 ± 0.016 and 50.063 ± 7.901 mBqkg<sup>-1</sup>h<sup>-1</sup>, respectively. The annual effective dose of radionuclides in all sampling locations was found to be lower than UNSCEAR's recommended level of 0.07 mSvy<sup>-1</sup> for soil in an outdoor environment. In the secondary study, gross α and gross β activities in soil and date palm pits samples were measured by a low background α/β counting system. Average values of gross α and gross β activities in soil and date palm pits samples were 5.761 ± 0.360 Bqkg<sup>-1</sup>, 38.219 ± 8.619 Bqkg<sup>-1</sup> and 0.556 ± 0.142 Bqkg<sup>-1</sup>, 24.266 ± 1.711 Bqkg<sup>-1</sup>, respectively.
Kraishan Amani,Shayeb Mohammad Abu,Belmabrouk Hafedh,Qwasmeh Ahmad Ali Husein,Baloch Muzahir Ali 한국원자력학회 2024 Nuclear Engineering and Technology Vol.56 No.5
The study conducted in the northwest region of Jordan aimed to assess the levels of natural radioactivity in soil and olive mill pomace (OMP) samples. The researchers used Nal (TI) gamma-ray spectrometry to measure the activity concentrations of 226Ra, 232Th, 40K, and 137Cs in the samples. The average activity concentrations of 226Ra, 232Th, 40K, and 137Cs in the soil samples were found to be 18.624 ± 5.82, 12.276 ± 5.728, 518.33 ± 212.57, and 0.140 ± 0.09 (Bq, kg−1), respectively. In the OMP samples, the average activity concentrations of 226Ra, 232Th, and 40K were 7.272 ± 4.386, 3.454 ± 1.503, and 169.997 ± 81.873 (Bq kg−1), respectively, and no 137Cs was detected. The study also investigated fundamental parameters associated with radon, specifically the radon emanation coefficient ( ) and radon mass exhalation rate ( ). The values ranged from 0.621 to 0.78 (Bq kg−1), with an average value of 0.71 ± 0.06 (Bq kg−1). The estimated from the soil samples ranged from 65.83 to 124.86 (mBq kg−1h−1), with an average value of 99.74 ± 21.73 (mBq kg−1h−1). Regarding radiological hazards, the study examined various parameters, including radium equivalent activity, external and internal hazard indices, gamma and alpha indices, absorbed gamma dose rate, and excess lifetime cancer risk. All of these assessed values were found to be below the worldwide recommended limits for radiological safety. Additionally, the study analyzed the concentrations of gross alpha and gross beta radioactivities in soil and OMP samples. The soil samples had an average gross alpha activity of 4.642 ± 1.04 (Bq kg−1) and an average gross beta activity of 48.13 ± 14.50 (Bq kg−1). The OMP samples showed an average gross alpha activity of 0.32 ± 0.27 (Bq kg−1) and an average gross beta activity of 59.19 ± 12.94 (Bq kg−1). Overall, the obtained results are crucial for evaluating the radiological risks associated with natural radioactivity in the northwest region of Jordan. The findings establish baseline data for comparison and reference for radioactivity levels in the environment.