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Natural Radioactivity Measurement in Surface Soil Samples Collected from Qadissia district (Alaskan Alssinaey) inNassiriyah City, Thi-Qar province, Iraq | ||
| Journal of College of Education for Pure Science | ||
| Article 1, Volume 7, Issue 1, 2017, Pages 54-68 | ||
| Author | ||
| Manar Dheyaa Salim | ||
| Abstract | ||
| People are being continuously exposed to ionizing radiations, there are many sources of radiation and radioactivity in the environment, radioactivity may be natural and artificial. The total amount of radioactivity in an environment should be accurately known and kept to a level as low as reasonably achievable. Laboratory based NaI(Tl) detector Gamma ray spectroscopy system was exploited to determine distribution of gamma emitting radionuclides (238U, 232Th and 40K) in surface soils for 21 locations within Qadissia district in Nassiriyah city, Thi-Qar province, Iraq. These sites were marked-out using Global Positioning System (GPS). The measured activity concentrations ranged from 26.03 ± 3.22 to 33.82 ± 5.32 (30.41 ± 4.28) Bq/kg for 238U, 19.76 ± 2.01 to 28.11 ± 3.16 (24.79 ± 3.23) Bq/kg for 232Th and 277.86 ± 11.86 to 368.92 ± 19.84 (316.51 ± 15.95) Bq/kg for 40K, with mean values enclosed in the brackets. The lowest value of Radium equivalent activity is 77.59 Bq/kg, while the highest value is 102.01 Bq/kg, with average value 90.24 Bq/kg, and the absorbed dose rate varied between 36.06 to 47.17 nGy/h, with an average value of 41.68 nGy/h. Also, in the present work are measured both (external and internal) hazard indices, they ranged from 0.209 to 0.275 with an average of 0.243, and from 0.279 to 0.365 with an average of 0.325 respectively. All the results that were obtained were within the permissible limits and in accordance with recent recommendations from the United Nations Scientific Committee on the Effect of Atomic Radiation (UNSCEAR | ||
| Keywords | ||
| Natural Radioactivity; gamma; Ray Spectrometry; NaI; Specific activity | ||
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