[PDF] Top 20 Assessment of Natural Radioactivity Concentration and Dose in Surface Soil Samples from Atbara

... relatively distributed in soil based on the nature of its geological formations[5]. As radioisotopes spread in the whole ecosystem of the Earth they do not produce an essential problem for the human beings. ... See full document

... for soil samples from LAUTECH, Ogbomoso, ...of natural radioactivity of absorbed dose rates due to the activity concentrations of 40 K, 232 Th and 226 Ra in soil ... See full document

... pollution from human activities in contact with the rivers in the ...activity concentration obtained in this study was lower than the values obtained for drinking water in Nigeria by (Umar et ...hazard ... See full document

... the concentration levels of natural radioactivity increase with the use of phosphate rocks, thereby enhancing radiation dose and causing diseases to the surrounding population (Righi et ...the ... See full document

... The radioactivity concentrations of 238 U, 40 K and 232 Th and the associated radiation hazard levels in soil samples in the 3 different locations of the study area were investigated using gamma ray ... See full document

... of natural radioactive isotopes due to their geological composition, where the focus is on natural chains of Uranium-238 and Thorium-232 in addition to Potassium-40, regarded as the most important factors ... See full document

... the soil and the effects of radiation on human health must be ...addition, assessment of natural radioactivity levels in the soil is crucial for analyzing the changing in the ... See full document

... of natural abundance of ...of natural origin is very important being the largest source of population dose and its assessment is important as a base- line with which radiation protection ... See full document

... while from a distance of 50m away from power plant, radon activity varies from ...effective dose equivalent varies from ...the soil in nearby places of the plant lowers the ... See full document

... in soil assumes a critical part in radiation security (Aziz et ...2014). Natural radionuclides in soil represent the significant component of population background ...of natural radionuclides ... See full document

... to natural terrestrial ...that radioactivity in the soil adds to the background level of radiation and human beings are ...the concentration of the radioactive materials in the soil but ... See full document

... to assessment of Natural Radioactivity and Associated Radiation Hazards in soil samples, activity concentration of naturally occurring radionuclides was measured by using a gamma ... See full document

... the radioactivity concentration of 33 soil samples collected from a new historical area which was discovered in east of Saudi Arabia at 2009 G, Called ...Al-Rakkah. From this ... See full document

... These are delayed effects induced due to exposure to radiation. This induction takes place without a threshold level but over all range of doses. Stochastic effects may occur on modification of an irradiated cell. The ... See full document

... 40K natural activity concentrations in surface soils/sediments of some mining areas in Central Nasarawa State Nigeria, using Sodium Iodide-Thallium Gamma ...identified from the highly mining areas of ... See full document

... The concentration of radioactivity importantly differs from a country to a country, so that the measurement of the natural radioactivity due to gamma rays from the dose ... See full document

... the natural radioactivity concentration of 226 Ra is lower than that of 232 Th at the ...absorbed dose rate, annual effective dose rate and the Representative level index activity were ... See full document

... absorbed dose rate (ADR) obtained by equation (2) indicated that the lowest dose rate was ...the soil sample S4, while the highest dose rate was ...the soil represented by sample S7. ... See full document

... ) = (1) here is the net gamma counting rate (counts per second) for a peak at energy E, is the detected efficiency of a specific  ray, is the intensity of the line in radionuclides, and is the mass of the soil ... See full document

... radiation from various natural radiation sources and to isolate from other radiation sources used in nearby ...contribution from Pb X-ray fluorescence and the top was covered by round movable ... See full document