Assessment of Gamma Radiation 232Th, 226Ra and 40K in Nassarawa, Nigeria

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U. Rilwan
I. Umar
A. Z. Ngari
H. A. Abdullahi
H. O. Aboh


This study assessed gamma radiation from 232Th, 226Ra and 40K. Twelve soil samples collected from the study area were analyzed using Nal (TI) detector. Mean concentration for 40K, 232Th and 226Ra were found to be 483.97±7.32 Bq/kg, 28.43±5.30 Bq/kgS and 66.84±2.02 Bq/kg respectively. Absorbed Dose Rate ranged from 44.85 nGy/h to 90.71 nGy/h with a mean of 73.68 nGy/h. Effective Dose Rate ranged from 0.055 to 0.111 msv/yr with a mean of 0.090 mSv/y. The Internal and External Hazard Indices ranged from 0.271 to 0.533 Bq/kg with the mean of 0.435 Bq/kg and 0.289 to 0.675 Bq/kg with the mean of 0.512 Bq/kg respectively. It can thus be concluded that the radiation dose of the study area is minimal and seems to have low exposure for the inhabitants in and around the contaminated areas. It is therefore recommended that regular radiation monitoring exercises should be conducted on the processing sites to prevent the inhabitants of the area from high radiation exposure due to direct inhalation of finely divided particulates and dust comprised of the above-mentioned radionuclides.

Soil, mining, columbite, radionuclide, health absorbed dose, effective dose, radium equivalent activity, external and internal hazard index and γ-ray spectrometry.

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How to Cite
Rilwan, U., Umar, I., Ngari, A. Z., Abdullahi, H. A., & Aboh, H. O. (2020). Assessment of Gamma Radiation 232Th, 226Ra and 40K in Nassarawa, Nigeria. Asian Journal of Research and Reviews in Physics, 2(4), 1-10.
Original Research Article


Roscoe RJ, Steenland K, Halperin WE, Beaumont JJ, Waxweiler RJ. Lung cancer mortality among nonsmoking uranium miners exposed to radon daughters. JAMA. 1989;262(5):629–633.

Roscoe RJ, Deddens JAA, Salvan A, Schnorr TM. Mortality among Navajo uranium miners. American Journal of Public Health. 1995;85(4):535–540.

AZU DS. Measuring of radiation levels in mining processing plants in Jos metropolis. Chemical Analysis by Nuclear methods Edited by Z.B Atfassi (1994): John Wiley and Son Ltd; 1995.

UNSCEAR. Exposure of public and workers from various sources of radiation. United Nation Scientific Committee on Effect of Atomic Radiation UNSCEAR Report. 1988;1(1):12.

UNCEAR. Radiological Protection Bulletin. United Nations Scientific Committee on the effect of Atomic Radiation No. 224, New York; 2000.

Veiga RG, Sanches N, Anjos RM, Macario K, Bastos J, Iguatemy M, Auiar JG, Santos AM, Mosquera B, Carvalho C, Baptista Filho M, Umisedo NK. Measurement of natural radioactivity in Brazillian beach sands. Journal of Radiations Measurement. 2006;41(1):189.

Arena V. Radiation dose and radiation exposure to the human population. In Ionizing radiation and like. St. Louis, The C.V. mostly C.O publishers. 1971;123- 156.

Barcelos CC, Amaral E, Rochido E. Radionuclide transportation by de Caldas Plateau Rivers Brazil. Journal of Environmental Technology. 1990;11(6): 533.

NCNE Basic Guidelines for radiological protection. Rio de Janeiro Brazil. National Commission of Nuclear Energy. NN-3.01; 2005.

IAEA Measurement of Radiation includes in food and the environment. International Atomic Energy Agency. Tech. Report. Series 295; 1989.

Innocent AJ. Evaluation of naturally occurring radionuclide materials from solid minerals processing in Zamfara State, Nigeria. Journal of Environmental Physics. 2012;82(1):47.

Merrill C, Tom G. Environmental Radioactivity. Nuclear Engineering Laboratory, 103 South Godwin Aven, Urban, 1161801, USA; 1997.

Osoro K. Assessment of natural radioactivity in surface soils around titanium mines in Kenya. Journal of Radiation Measurement. 2011;41(1):189-196.

Semat H, Aibright JR. Introduction to Atomic and Nuclear Physics (5th Ed.). Chapman Hall Ltd. London. 1993;176.

Umar. Assessment of exposure due to naturally occurring radionucide in granite quarry mining site in Nasarawa State, Nigeria. Journal of Health Physics. 2013; 21(1):22.