Spatial Distribution and Mapping of Indoor Gamma Radiation Exposure in Wushishi Township, Niger State

Abstract: This study presents a comprehensive assessment of indoor background radiation exposure in Wushishi Township, Niger State, Nigeria, with a focus on estimating the annual effective dose to the lungs of residents. Radiation measurements were systematically conducted across 21 randomly selected locations representing residential, public, and industrial zones to ensure spatially representative sampling. Using a Geiger-Mueller tube-based dosimeter (GQ GMC-500+), readings were taken at a standardized height of 1 meter above ground level, following Environmental Measurement Laboratory (EML) protocols to approximate the adult breathing zone and minimize ground-level bias. At each location, six consecutive readings were recorded at one-minute intervals to account for statistical fluctuations, with mean values and standard deviations calculated to assess central tendency and dispersion. GPS coordinates were logged at all sites, facilitating spatial analysis and the generation of radiation distribution maps. The results revealed notable spatial variations in radiation levels, with the highest exposures observed in industrial areas such as the Dangote Company and the lowest in natural settings like the River Basin. However, all measured annual effective doses to the lungs (ranging from 1.511E-07 to 1.874E-07 mSv/y) were significantly below the International Commission on Radiological Protection (ICRP) public dose limit of 1 mSv/y. This study establishes essential baseline data for Wushishi Township and highlights the importance of continued radiological monitoring, particularly in areas influenced by industrial and geological factors. Keywords: Indoor Gamma Radiation Exposure, Environmental Measurement Laboratory (EML), radiological monitoring, industrial and geological factors. Title: Spatial Distribution and Mapping of Indoor Gamma Radiation Exposure in Wushishi Township, Niger State Author: Salihu M., Adams S., Abdulhameed S., Nura G. K., Mustapha M. K., Shehu I. D., Bala S., Daniel J. International Journal of Interdisciplinary Research and Innovations ISSN 2348-1218 (print), ISSN 2348-1226 (online) Vol. 13, Issue 2, April 2025 - June 2025 Page No: 49-59 Research Publish Journals Website: www.researchpublish.com Published Date: 22-May-2025 DOI: https://doi.org/10.5281/zenodo.15489327 Paper Download Link (Source) https://www.researchpublish.com/papers/spatial-distribution-and-mapping-of-indoor-gamma-radiation-exposure-in-wushishi-township-niger-state