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Determine the effectiveness of the concentrations of radioactivity of natural 40K, 238U,and 232Th wetland sediment in the Sea of Najaf, Iraq
تحديد فعالية التراكيز النوعية للنشاط الإشعاعي الطبيعي العراق– لرواسب الاراضي الرطبة في بحر النجف 238U،232Th،40Kل

Authors: Mohammed J.S. Al-Haidarey محمد جواد صالح الحيدري --- Heiyam N.Majeed هيام ناجي مجيد --- Tahani M.Kadhim تهاني مزهر كاظم
Journal: Albahir journal مجلة الباهر ISSN: 23125721 Year: 2015 Volume: 2 Issue: 3,4 Pages: 43-54
Publisher: AL-Abbas Holy Shrine العتبة العباسية المقدسة

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Abstract

Abstract In the current study the radio activity concentrations have been measured for samples of sediment taken from the Sea of Najaf. The Concentrations were investigated for (238U, 232Th, 40K) using NaI(Tl) 3"×3" system. The result show that the radio activity of potassium 40K ranged between (427.806±4.827 308.517±4.099) Bq/Kg, average (378.161±4.235) Bq/Kg; Uranium 238U ranged between (8.446±0.357 3.730±0.237) Bq/Kg, average (5.977±0.297) Bq/Kg; Thorium 232Th ranged between (4.609±0.264 0.0059±0.002) Bq/Kg, average (0.700±0.038) Bq/Kg; and Radium equivalent values ranged between (44.017±1.034 30.182±0.594) Bq/Kg, average (36.097±0.678) Bq/Kg. The Absorbed dose rate in air ranged between (22.681±0.496 - 16.000±0.300) nGy.h-1, average (18.965±0.337) nGy.h-1. By comparing the experimental results with the globally calculated results it found that effectiveness of radiation concentrations of the samples studied within the globally range.

اﳋلاصة ﺗﻢ ﰲ ﻫﺬﻩ ﺍﻟﺪﺭﺍﺳﺔ ﻗﻴﺎﺱ ﺍﻟﻔﻌﺎﻟﻴﺔ ﺍﻻﺷﻌﺎﻋﻴﺔ ﺍﻟﻨﻮﻋﻴﺔ ﻟﻨﲈﺫﺝ ﺍﻟﱰﺳﺒﺎﺕ ﺍﳌﺄﺧﻮﺫﺓ ﻣﻦ ﻣﻨﻄﻘﺔ ﺑﺤﺮ ﺍﻟﻨﺠﻒ. ﺍﺫ ﺗﻢ ﲨﻊ ﺍﺛﻨﺎ ﻋﴩ ﻧﻤﻮﺫﺟﺎﹰ ﻣﻦ ﻫﺬﻩ ﺍﻟﱰﺳﺒﺎﺕ ﻭﻛﺎﻧﺖ ﻫﺬﻩ ﺍﻟﻨﲈﺫﺝ ﰲ ﻣﻮﺍﻗﻊ ﳐﺘﻠﻔﺔ. ﻭﻟﺘﺤﺪﻳﺪ ﺍﻟﻔﻌﺎﻟﻴﺔ ﺍﻟﻨﻮﻋﻴﺔ ﻟﻜﻞ ﻣﻦ ﺍﻟﻨﻮﻳﺪﺍﺕ .NaI (Tl) 3"×3" ( ﺗﻢ ﺍﺳﺘﻌﲈﻝ ﻣﻨﻈﻮﻣﺔ ﻛﺎﺷﻒ ﻳﻮﺩﻳﺪ ﺍﻟﺼﻮﺩﻳﻮﻡ ﺍﳌﻨﺸﻂ ﺑﺎﻟﺜﺎﻟﻴﻮﻡ 238U ،232Th ،40K)ﺍﳌﺸﻌﺔ ﺗﱰﺍﻭﺡ ﻣﺎ ﺑﲔ40Kﺑﻴﻨﺖ ﺍﻟﻨﺘﺎﺋﺞ ﺃﻥ ﺍﻟﻔﻌﺎﻟﻴﺔ ﺍﻹﺷﻌﺎﻋﻴﺔ ﻟﻠﺒﻮﺗﺎﺳﻴﻮﻡ ﻭﺍﻟﻴﻮﺭﺍﻧﻴﻮﻡ Bq/Kg (378.161±4.235) ﻭﺑﻤﻌﺪﻝBq/Kg (308.517±4.099 - 427.806±4.827) 232Th ﻭﺍﻟﺜﻮﺭﻳﻮﻡ Bq/Kg (5.977±0.297) ﻭﺑﻤﻌﺪﻝ238U Bq/Kg (8.446±0.357 3.730±0.237) . ﻛﲈ ﺣﺴﺐ ﻣﻜﺎﻓﺊ ﺍﻟﺮﺍﺩﻳﻮﻡ Bq/Kg (0.700±0.038) ﻭﺑﻤﻌﺪﻝBq/Kg (4.609±0.264 0.0059±0.002) .Bq/Kg (36.097±0.678) ﻭﺑﻤﻌﺪﻝBq/Kg (44.017±1.034 30.182±0.594) ﻭﻛﺎﻥ ﻳﱰﺍﻭﺡ ﺑﲔ ﻭﺑﻤﻌﺪﻝ nGy.h-1 (22.681±0.496 - 16.000±0.300) ﺃﻣﺎ ﻗﻴﻢ ﺍﳉﺮﻋﺔ ﺍﳌﻤﺘﺼﺔ ﰲ ﺍﳍﻮﺍﺀ ﻓﻘﺪ ﺗﺮﺍﻭﺣﺖ ﻣﻦ . ﻭﺟﺪﺕ ﺍﻟﺪﺭﺍﺳﺔ ﺃﻥ ﻣﺴﺘﻮﻳﺎﺕ ﺍﻟﻔﻌﺎﻟﻴﺔ ﺍﻹﺷﻌﺎﻋﻴﺔ ﺍﻟﻨﻮﻋﻴﺔ ﻟﻠﻨﲈﺫﺝ ﺍﳌﺪﺭﻭﺳﺔ ﺗﻘﻊ nGy.h-1 (18.965±0.337) ﺿﻤﻦ ﺍﳊﺪﻭﺩ ﺍﳌﺴﻤﻮﺡ ﲠﺎ ﻋﺎﳌﻴﺎ.

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