Radiometric maps describe the level of radiation and the distribution of natural and man-made radionuclides in the environment. Terrestrial radiation, a significant component of the natural radiation sources, is generated by natural radionuclides in rocks and corresponds to the Earth' s surface geological setting. Radioactivity of the environment is predominantly determined by detection of gamma rays and expressed in gamma dose rate (nGy/h) or by concentrations of individual radionuclides. Radiometric maps are applicable to basic geological studies, exploration for minerals and raw materiaIs, radon risk mapping, determination of nuclear fallout contamination and assessment of radioactivity of the environment.


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