Abstract
The current work deals with measurement and distribution of natural radionuclides for twelve (12) soil and fifteen (15) stone samples collected from Harrats Al Madinah in western region of Saudi Arabia. Two methods were used in this investigation gamma-ray spectrometer (GRS) and X-ray fluorescence (XRF).The activity concentrations of radionuclides (226Ra, 232Th and 40K) were measured using ?-ray spectrometer NaI(Tl) model (A320) made in the U.S.A. The average values of the concentrations of 226Ra, 232Th and 40K were 37.5?±?0.1, 28.0?±?0.5 and 300.6?±?1.7?Bq/kg respectively. The obtained results show that the mean radium equivalent activity, annual effective dose, external and internal hazard indices and radiation level index were 100.67?BqKg-1, 55.63µSv, 0.27, 0.37 and 0.73 respectively. The results were compared with the recommended limits in the literature from other locations and with the global allowable limits recommended by International Commission on Radiological Protection and United Nations Scientific Committee on the Effects of Atomic Radiation (UNSCEAR). The obtained results are concordant with the magnitude of safe criteria and exposure risks which were recommended in public papers. The current study is considered as the first baseline data for the natural radioactivity and metal contents measured by X-ray fluorescence method in the Harrat Al Madinah city.
Highlights
The current work deals with measurement and distribution of natural radionuclides for twelve (12) soil and fifteen (15) stone samples collected from Harrats Al Madinah in western region of Saudi Arabia
Natural background radiation are the main sources of outdoor terrestrial gamma dose as humans are continuously exposed to ionizing radiation from natural radionuclides like 226Ra, 232Th and 40K from the soil
The current study focuses on radiometric and chemical analysis of soil and stone samples collected from Al Madinah city in Saudi Arabia using X-ray fluorescence (XRF) and NaI (Tl) scintillation detector
Summary
Assessment of radiological parameters and metal contents in soil and stone samples from Harrat Al Madinah, Saudi Arabia. A Physics Department, College of Science, Qassim University, Buraydah, 51452, Saudi Arabia b Physics Department, College of Science, Al-Azhar University, Assuit, 71452, Egypt c Physics Department, College of Science and Art, Ar Rass, Qassim University, Saudi Arabia d Physics Department, Faculty of Women for Arts, Science and Education, Ain Shams University, Egypt
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