International Journal of Radiation Research
نشریه پرتو پژوه
Int J Radiat Res
Basic Sciences
http://ijrr.com
79
journal79
2322-3243
2345-4229
10.61186/ijrr
en
jalali
1400
4
1
gregorian
2021
7
1
19
3
online
1
fulltext
en
Background radiation level measurement using hand held dosimeter and gamma spectrometry in Ijebu-Ife, Ogun State Nigeria
Radiobiology
Radiobiology
تحقيق بديع
Original Research
<div style="text-align: justify;">Background: The knowledge of distribution of radionuclides and background radiation levels in the environment is important for assessing the effects of radiation exposure due to both terrestrial and extra-terrestrial sources. Materials and Method: In-situ gamma dose survey and gamma spectrometry was employed to investigate background radiation levels in Ijebu-Ife. Results: In-situ gamma dose rates vary from 0.02 to 0.10 µSv/hr with mean value of 0.05 µSv/hr which is less than 0.133 μSv/hr, recommended by the ICRP. The resulting annual effective dose was below 1 mSv/yr maximum permissible limit for the general public set by the UNSCEAR, 2000. The activity concentrations of the three naturally occurring radionuclides in soils ranged from Below Detection Level (BDL) to 320.11 ± 28.53, 9.11 ± 1.65 and 8.55 ± 0.95 Bq/kg with mean values of 119.05 ± 11.24 Bq/kg, 4.44 ± 1.01 Bq/kg and 4.55 ± 0.62 Bq/kg respectively which are lower than the average values of 400, 35, and 30 Bq/kg recommended by the UNSCEAR, 2000 for <sup>40</sup>K, <sup>226</sup>Ra, and <sup>232</sup>Th respectively. The mean computed values for absorbed dose rate, annual effective dose and radium equivalent are 10.03 nGy/hr, 0.03 mSv/yr, 20.11 Bq/kg respectively, which fall within UNSCEAR, 2000 threshold. Conclusion: A significant positive relationship exists between the in-situ and evaluated effective dose equivalents (r = 0.89, p < 0.05). Radiation dose results indicate insignificant radiological risk, making the study area safe for living and agriculture purposes.</div>
Radionuclides, in-situ dose rate, gamma spectrometry
591
598
http://ijrr.com/browse.php?a_code=A-10-2188-33&slc_lang=en&sid=1
P.O.
Olagbaju
olagbajupetero@gmail.com
7900319475328460020254
7900319475328460020254
Yes
Physics Department, North West University, Mafikeng Campus, South Africa
I.C.
Okeyode
7900319475328460020255
7900319475328460020255
No
Physics Department, Federal University of Agriculture, Abeokuta. Ogun State, Nigeria
O.O.
Alatise
7900319475328460020256
7900319475328460020256
No
Physics Department, Federal University of Agriculture, Abeokuta. Ogun State, Nigeria
B.S.
Bada
7900319475328460020257
7900319475328460020257
No
Department of Environmental Management and Toxicology, Federal University of Agriculture, Abeokuta, Ogun State, Nigeria