Applied Mathematics and Physics
ISSN (Print): 2333-4878 ISSN (Online): 2333-4886 Website: Editor-in-chief: Vishwa Nath Maurya
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Applied Mathematics and Physics. 2016, 4(1), 16-25
DOI: 10.12691/amp-4-1-3
Open AccessArticle

Characterization of Dose Rates and Its Internal Fluctuation Using Frequency Distribution Function of Background Radiation Data

Dinyo Enoch Omosehinmi1, and Adeseye Muyiwa Arogunjo1

1Department of Physics, Federal University of Technology, Akure, Nigeria

Pub. Date: December 10, 2016

Cite this paper:
Dinyo Enoch Omosehinmi and Adeseye Muyiwa Arogunjo. Characterization of Dose Rates and Its Internal Fluctuation Using Frequency Distribution Function of Background Radiation Data. Applied Mathematics and Physics. 2016; 4(1):16-25. doi: 10.12691/amp-4-1-3


The use of distribution function in characterization of data technique, to evaluate and estimate dose rates from background radiation in Akure informed this study. The mean and fluctuation in mean of possible exposure due to the members of the general public in Akure was deduced by statistically calculating the mean and fluctuation in mean of 166 sample points. Kindenoo blueGeiger PG-15 detector and Garmin GPSmap 62s were used for the research. The Dose Rate (DR) and its internal fluctuation range between 0.16±0.01μSv/h – 0.37±0.04μSv/h in air, and Annual Effective Dose Equivalent, AEDE between 0.31±0.02mSv/y – 0.71±0.08mSv/y; the estimated mean outdoor AEDE 0.50±0.06mSv/y for members of the general public in Akure is below the UNSCEAR and ICRP recommended 1mSv/y annual exposure dose rate. All the estimated AEDE from measured dose rates at the chosen locations have values far lower than the 100mSv limit of admissible low-level radiation. The skewness and kurtosis of DR distribution is 0.134 and 0.251 with standard error 0.188 and 0.375. The predicted probability function of observing a specific count x in this study is P(x)=0.7826.

background radiation dose rate radionuclide distribution function Akure

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[1]  C.F. Yeșilkanat, Y. Kobya, H. Tașkin, U. Ҫevik, Dose rate estimates and spatial interpolation maps of outdoor gamma dose rate with geostatistical methods; A case study from Artvin, Turkey. Journal of Environmental Radioactivity, 150, 2015, 132-144.
[2]  UNSCEAR, Sources and effects of ionizing radiation. United Nations Scientific Committee on the Effects of Atomic Radiation, UNSCEAR 2000 Report to the General Assembly, with scientific annexes. United Nations sales publications No. E.00.IX.3 (Volume I: Sources) and No. E.00.IX.4 (Volume II: Effects). United Nations, New York.
[3]  P.H. Hiemstra, E.J. Pebesma, C.J.W. Twenhӧfel, and G.B.M. Heuvelink, Real-time automatic interpolation of ambient gamma dose rates from the Dutch radioactivity monitoring network. Computers & Geosciences, 35(8), 2009, 1711-1721.
[4]  P.A. Karam, and B.P. Stein, Radioactivity Science Foundations (New York, United States: Infobase Publishing, 2009) 19-21.
[5]  CNSC, Introduction to radiation, Canadian Nuclear Safety Commission, 2012. Available at
[6]  Norwegian Academy of Science and Letters, Natural Ionizing Radiation and Health- Proceedings from a symposium held at the Norwegian Academy of Science and Letters, Oslo 6-7 June, 2001.
[7]  Health Physics Society, Radiation and risk: Expert perspectives. Health Physics Society, 1313 Dolley Madison Blvd, Suite 402, McLean, VA 22101, 2013.
[8]  O.S. Ajayi and S.B. Ibikunle, Radioactivity of surface soils from Oyo State, Southwestern Nigeria. International Journal of Radiation Research, 11(4), 2013.
[9]  V. Attila, N. Sándor, and K. Zoltan, Instrumentation, separation techniques environmental issues, 5: 290, 2010.
[10]  A.M. Muhammad, I.I. Funtua, S.P. Malam, and A.S. Arabi, Determination of Absorbed and Effective Dose from Natural Background Radiation around a Nuclear Research Facility, Ahmadu Bello University, Zaria, Zaria-Nigeria. American Journal of Environmental Sciences 7(2), 2011, 173-177.
[11]  UNSCEAR, Sources and effects of ionizing radiation, United Nations Scientific Committee on the Effects of Atomic Radiation. Report to the General Assembly with Scientific Annexes, Volume 1, 2008.
[12]  A. Sara, Studies on the Gamma Radiation Environment in Sweden with Special Reference to 137Cs, doctoral thesis, Department of Radiation Physics, University of Gothenburg, Göteborg, Sweden, 2008.
[13]  Department of Research and Statistics (2010). Ministry of Economic Planning and Budget, Akure, Ondo State.
[14]  M.A. Rahaman, Review of the basement geology of South-Western Nigeria. In: C.A. Kogbe (Ed.) Geology of Nigeria. Elizabethan Publishing Co; Lagos, Nigeria, 1976, pp. 41-58.
[15]  V.O. Olarewaju, Geochemistry of the charnockitic and granitic rocks of the basement complex around Ado-Ekiti – Akure, Southwestern, Nigeria. Unpublished Ph. D. thesis, University of London, 1981. pp. 17-28.
[16]  M.O. Olorunfemi, J.S. Ojo, and O.M. Akintunde, Hydro-geophysical evaluation of the groundwater potential of the Akure metropolis, southwestern Nigeria. Journal of Mining and Geology, 35(2), 1999, 207-228.
[17]  D.E. Omosehinmi, Ambient radiation mapping in Akure north and south local government areas of Ondo State, Nigeria, masters thesis, Department of Physics, Federal University of Technology, Akure, Nigeria, 2015.
[18]  G.F. Knoll, Radiation detection and measurement, third edition (New York, United States: John Wiley & Sons, Inc. 2000) 65-70.
[19]  J.E. Turner, Atoms, radiation, and radiation protection, third edition (Weinheim, Germany: WILEY-VCH Verlag GmbH & Co. kGaA., 2007) 303-321.
[20]  C. Herman, and E.J. Thomas, Introduction to health physics, fourth edition (United States: The McGraw-Hill Companies, Inc., 2009) 486-489.
[21]  S.R. Cherry, J.A. Sorenson, and M.E. Phelps, Physics in nuclear medicine, fourth edition (Philadelphia, PA 19103-2899: Saunders Elsevier Inc., 2012) 125-130.
[22]  ArcGIS, ArcGIS 9.1 desktop help, ESRI, Environmental Systems Research Institute, Redlands, California.
[23]  A.M. Arogunjo, H.O. Ohenhen, and S.P. Olowookere, A re-evaluation of the occupancy factors for effective dose estimate in tropical environment. Radiation Protection Dosimetry, 112(2), 2004, 259-265.
[24]  M.R. Eyebiokin, A.M. Arogunjo, G. Oboh, F.A. Balogun, and A.B. Rabiu, Activity concentrations and absorbed dose equivalent of commonly consumed vegetables in Ondo State, Nigeria. Nigeria Journal of Physics, 17(2), 2005, 187-192.
[25]  I.P. Farai, and U.E. Vincent, Outdoor radiation level measurement in Abeokuta, Nigeria, by thermoluminescent dosimetry. Nigerian Journal of Physics, 18(1), 2006.
[26]  ICRP, Recommendations of the ICRP. Annals of the ICRP 21(1-3), ICRP Publication 60, 1991.
[27]  ICRP, Recommendations of ICRP, Annals of the ICRP 37(2-4), ICRP Publication 103, 2007.
[28]  I.P. Farai, and J.A. Ademola, Radium equivalent activity concentrations in concrete building blocks in eight cities in Southwestern Nigeria. Journal of Environmental Radioactivity, 79, 2013, 119-125.
[29]  N.N. Jibiri, and J.B. Famodimu, Natural Background Radiation Dose Rate Levels and Incidences of Reproductive Abnormalities in High Radiation Area in Abeokuta, Southwestern Nigeria. Natural Science, 5(11), 2013, 1145-1153.
[30]  J.M. Cuttler, Commentary on Fukushima and beneficial effects of low radiation. Canadian Nuclear Society Bulletin, 34(1), 2013, 27-32.
[31]  L.E. Feinendegen, M. Pollycove, and R.D. Neumann, Hormesis by low dose radiation effects: Low-dose cancer risk modeling must recognize up-regulation of protection. Therapeutic Nuclear Medicine, Medical Radiology, Radiation Oncology, Springer Berlin Heidelberg, 2012.