Geospatial assessment of activity concentrations of natural radionuclides and absorbed dose rates in gidan-kwano, minna, nigeria using airborne radiometric data.

H O Shittu, I O Olarinoye, M T Kolo, S F Olukotun, M Mathuthu

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Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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5 authors.

H O ShittuDepartment of Research Laboratory and Development, National Agency for Science and Engineering Infrastructure (NASENI), Abuja, Nigeria.

I O OlarinoyeDepartment of Physics, Federal University of Technology, Minna, Nigeria.

M T KoloDepartment of Physics, Federal University of Technology, Minna, Nigeria.

S F OlukotunCenter for Applied Radiation Science and Technology (CARST), North-West University, Mafikeng Campus, Mahikeng, South Africa. olukotunsf@oauife.edu.ng.

M MathuthuCenter for Applied Radiation Science and Technology (CARST), North-West University, Mafikeng Campus, Mahikeng, South Africa.

Funding

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6 · The paper itself

Abstract

This study assessed the spatial distribution of natural radionuclides and the associated absorbed dose rates in Gidan-Kwano, Minna, Niger State, Nigeria, using airborne radiometric data acquired from the Nigerian Geological Survey Agency (NGSA). Activity concentrations of ²³⁸U, ²³²Th, and ⁴⁰K were determined, and geospatial contour and isodose maps were generated. Absorbed dose rates ranged from 18 to 69 nGy/h (mean: 32 nGy/h), below the global reference of 59 nGy/h, indicating low radiological risk. Pearson correlation analysis revealed a strong positive correlation for ⁴⁰K (R = 0.93), a moderate correlation for ²³²Th (R = 0.62), and a weak correlation for ²³⁸U (R = 0.08), suggesting ⁴⁰K largely drives spatial variability despite a lower dose contribution. Comparison with previous in-situ measurements showed weak agreement, reflecting methodological and spatial-scale differences. The findings establish a regional radiological baseline and demonstrate the utility of airborne surveys for environmental monitoring and radiation protection planning.

Indexed as

Activity concentrationAirborne radiometric dataContour mapGidan-KwanoIsodose mapNigerian Geological Survey Agency (NGSA)

Identifiers

PMID41851269

DOI10.1038/s41598-026-44462-z

PMCPMC13136430

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LicenceCC BY-NC-ND

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