الرئيسية / الفعاليات العلمية / NATURAL RADIOACTIVITY LEVELS IN SOIL SAMPLES OF SOME SCHOOLS IN AL-SHATRAH CITY AT DHI QAR GOVERNORATE, IRAQ

NATURAL RADIOACTIVITY LEVELS IN SOIL SAMPLES OF SOME SCHOOLS IN AL-SHATRAH CITY AT DHI QAR GOVERNORATE, IRAQ

Dhahir Mohammed Dhahir1a, Hussien Abid Ali Mraity2a, Ali Abid Abojassim3a*
, Laith
Ahmed Najam4b and Hashim Yousef Yaqoub Al-kazrajy5a
aUniversity of Kufa, Faculty of Science, Department of Physics, Najaf, IRAQ. Email:
dhahim.hassan@uokufa.edu.iq1
; hussein.mraity@uokufa.edu.iq2
; ali.alhameedawi@uokufa.edu.iq3
;
aphdstudentalimadoolajawdah@gmail.com5
bUniversity of Mosul, Faculty of Science, Physics Department, Mosul, IRAQ. Email:
prof.lai2014@uomosul.edu.iq4
Corresponding Author: ali.alhameedawi@uokufa.edu.iq
Accepted: 9th Aug 2020 Received: 16th Aug 2020 Published: 31st Oct 2020
DOI: https://doi.org/10.22452/mjs.vol39no3.9
ABSTRACT In this article, natural radioactivity emitted from 238U, 232Th and 40K
were measured in the samples of soil which were gathered from different schools of AlShatrah in Dhi Qar Governorate using Gama ray spectroscopy (NaI (Tl), “3×3” volume)
technique. The radiation effects resulted from the exposure to radioactivity of the samples
under study (e.g. radium equivalent parameter (Raeq), the absorbed dose rate (Dr), the external
hazard (Hex) and the internal hazard (Hin) indices, and the representative gamma rays hazard
index (Iγ)) were calculated. The annual effective dose (AEDE) together with Excess lifetime
cancer risk (ELCR) index were also estimated. The results demonstrated that the averages of
the specific activity of the 238U, 232Th and 40K were 10.85±1.34Bq/Kg, 5.81±0.66 Bq/Kg and
354.11±21.60 Bq/Kg, respectively. The average values of each of Raeq, Dr, Hex, Hin, Iγ,
AEDEtotal and ELCR were 46.43±2.94 Bq/kg, 23.29±1.44 nGy/h, 0.125±0.007, 0.154±0.010,
0.366±0.022, 0.142±0.008 mSv/y and (0.499±0.030)×10-3
respectively. By comparing the
resulted data of this study with that of the average world limits which have been established
by UNSCEAR, OCDE and ICRP, one can concluded that there are no health risks threatening
the residents of Shatrah due to these radionuclides exist in the soil.
Keywords: natural radioactivity, Gamma ray spectroscopy, soil sample, NaI(Tl), Al-Shatrah,
Dhi Qar Governorate

 

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