Home About us Editorial board Search Ahead of print Current issue Archives Submit article Instructions Subscribe Contacts Login 
Home Print this page Email this page Small font size Default font size Increase font size Users Online: 30
ORIGINAL ARTICLE
Year : 2020  |  Volume : 43  |  Issue : 2  |  Page : 70-76

Assessment of environmental radiation exposure from soil radioactivity around the Southern area of Chad


1 Nuclear Structure Research Group (NSRG), School of Physics, University of Witwatersrand, Johannesburg, 2050; Department of Subatomic Physics, iThemba Laboratory for Accelerator Based Sciences, ZA-7129, South Africa
2 Department of Subatomic Physics, iThemba Laboratory for Accelerator Based Sciences, ZA-7129, South Africa
3 Nuclear Structure Research Group (NSRG), School of Physics, University of Witwatersrand, Johannesburg, 2050, South Africa
4 Department of Medical Physics, The Abdus Salam International Centre for Theoretical Physics, Trieste, Italy

Correspondence Address:
Ms. Mistura B Ajani
Nuclear Structure Research Group (NSRG), School of Physics, University of Witwatersrand, Johannesburg 2050; Department of Subatomic Physics, iThemba Laboratory for Accelerator Based Sciences, P.O. Box: 722, Somerset West, ZA-7129
South Africa
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/rpe.RPE_25_20

Rights and Permissions

A study to ascertain the radioactivity levels of various radionuclides from soil samples collected in Chad using a high-resolution gamma ray spectrometry system is presented in this article. The activity concentrations are determined for the radionuclides:226Ra,214Pb,214Bi and228Ac,208Tl,212Pb following the decay of238U and232Th as well as40K,235U, and137Cs. The values of activity concentrations of238U,232Th, and40K in the soil samples ranged from 2 to 245, 2–40, and 20–454 Bq/kg, whereas235U and137Cs ranged from 0.8 to 21.7 and 0.3–3.8 (Bq/kg), respectively. In order to evaluate the radiological exposure of the natural radioactivity, the radium equivalent activity, external exposure index, internal exposure index, and annual effective-dose equivalent have been calculated which ranged from 27 to 465 (Bq/kg), 0.09–1.25, 0.13–2.38, and 0.09–1.65 (mSv/y), respectively. Correlation between238U versus232Th,40K versus238U, and40K versus232Th was investigated; the results showed good correlation for238U versus232Th and40K versus238U while40K versus232Th gives poor correlation. For the 20 samples collected and analyzed for this study, the results showed that average activity concentration of238U is relatively higher than the world average, while for both232Th and40K, it was relatively lower.


[FULL TEXT] [PDF]*
Print this article     Email this article
Next article
Previous article
Table of Contents
Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
Citation Manager
Access Statistics
Reader Comments
Email Alert *
Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed233    
    Printed8    
    Emailed0    
    PDF Downloaded67    
    Comments [Add]    

Recommend this journal