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Showing 2 results for Kadhim
A.s. Alaboodi, N.a. Kadhim, Phd., A.a. Abojassim, A. Baqir Hassan,
Volume 18, Issue 1 (1-2020)
Abstract
Background: This research focuses on study of natural radioactivity (226Ra 238U, 232Th, 40K and 222Rn) in different types of water samples at Al-Hurrah City in Najaf province/Iraq using NaI (Tl) and RAD-7 detector. Materials and Methods: Samples have been collected from three major sources of water, City Water (Drinking Water), River Water and Underground Water. The daily consumption of these three sources by humans in construction materials determines the standards used to measure the Radiological Contamination in these sources such as Annual Effective Dose, Radium Equivalent, Absorbed Dose rate, External Hazard Indexes, Internal Hazard Indexes and Activity Concentration Index Due to Gamma Ray of long-live Radioisotopes. Results: The results show that the average of Radioactivity Concentration forRadium-232 were 1.84±0.39Bq/L, 2.31±0.43Bq/Land 7.15±1.88Bq/L, for Thorium-232 were 1.31±0.33Bq/L, 0.98±0.13Bq/Land 2.19±0.44Bq/L, for Potasium-40 were 9.07±1.32Bq/L, 22.29±2.93Bq/Land 40.89±8.93Bq/L and for Radon-222 were 35.5±0.00 mBq/L, 355.50±30.33 mBq/L and 712.00±97.20 mBq/L. Based on Gamma Radionuclides measurement, the mean annual effective doses of city water and river water are lower than the reference level of the effective dose recommended by the ICRP, while the mean annual effective doses of underground water were higher than the reference level of the effective dose recommended by the ICRP. Conclusion: Finally, the researcher found that all the radiological parameters such as Raeq, D, Hex, Hin and Iγ in the water samples were within the range the global limit, thus it’s safe to use in construction materials.
Q.j. Tarbool, S.h. Kadhim, A.s. Alaboodi, Ph.d., A.a. Abojassim,
Volume 20, Issue 2 (4-2022)
Abstract
Background: Natural radioactivity in the soil is the main reason behind this research. So, the natural radioactivity (40K, 238U, and 232Th) in soil samples have been measured in ten primary schools at north of Al-Najaf province. Materials and Methods: The specific activities (214Bi belongs to the uranium-238 series; 208TI belongs to the thorium-232 string and a natural radionuclide 40K) have been indicated by using spectral analysis technique of Gamma-ray of 3”x3” NaI(Tl) scintillation detector has been used. Results: The average value of specified activity for 40K, 238U, and 232Th in all samples is (201.47±24.47) Bq/kg, (10.17±1.78) Bq/kg, and (5.91±0.83) Bq/kg respectively. In this work, the majority of the hazard indices were calculated. The average value of radium Equivalent Activity was (16.673±1.71) Bq/kg, Absorbed Gamma Dose was (16.673±1.71) nGy⁄h, external hazard index was (0.092±0.009), internal hazard index was (0.120±0.013), representative gamma index was (0.261±0.026), Annual influential dose equivalent indoor was (0.082±0.008), for Annual influential dose equivalent outdoor was (0.020±0.002) mSv/y, and excess lifetime cancer risk was (0.358±0.03) × 10-3. Conclusion: Most of the detected readings are in the recommended values by (UNSCEAR, OECD, and ICRP) When compared with the worldwide average (40K=412 Bq/kg, 238U=35 Bq/kg, and 232Th= 45 Bq/kg). In other words, ten primary schools at Al-Najaf governorates are safe for work and free of radiation hazards to students.
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