Spatial Distribution of Naturally Occurring Radioactive Materials in Soil and the Consequent Population Effective Dose
Keywords:
Spatial distribution, NORMs, geological formation, geostatistical analysisAbstract
Communication in Physical Sciences 4(2):133-140
Authors: Habu Tela Abba and Muhammad Sani Isa
Received 20 September2019/Accepted 29 November 2019
Protection and assessment of any radiation pollution resulting from the use and disposal of radioactive materials to the large extent is based on the knowledge of natural radioactivity levels of an environment. Therefore, this work was designed to determine the distribution of naturally occurring radionuclides materials (NORMs) (in some residential areas within plateau state). Concentrations of 226Ra, 232Th and 40K in soil across the eight geological formations of Jos Plateau were measured using high resolution HPGe detector. The activity of 226Ra varied between 34 1 and 1006 Bq kg-1, 67 2 and 1695 37 for 232Th and between 67 4 and 2465 45 Bq kg-1for 40K.The mean concentration exceeded their corresponding global average values. Annual effective dose due to gamma radiation for general public were within the permissible limit of 1 mSv. The radiometric data obtained from the study could be useful for geochemical exploration in the study area.
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