Measurements of Naturally Occurring Radioactive Materials for some Granite Rocks samples in the Eastern Desert Egypt

Abstract

The distribution of natural radionuclide γ-ray activities and their respective annual effective dose rates, produced by 238 U, 226 Ra, 228 Ra, 235 U, 232 Th and 40 K were determined for igneous rock samples collected along the road between Idfu and Marsa Alam in eastern desert of Egypt. This subject is important in environmental radiological protection, since igneous rocks are widely used as building material. The variation in concentration of radionuclides for thirty igneous rock samples was determined. A HPGe spectrometer was used for quantification of gamma emitting radionuclides in the samples. All igneous rocks contained radionuclides from the uranium and thorium series as well as 40 K. 238 U concentrations in samples ranged from 12. 235 U from 1.16±0.11 to 4.83±0.44, 228 Ra ranged from 10. 24±0.70 to 17.35±1.29, 232 Th range from 9.99±0.67 to l7.65±1.23 Bq.kg -1 and 40 K from 298.58±21.74 to 955.78±69.58 Bq.kg -1 .

Estimation of natural radioactivity in local and imported polished granite used as building materials in Saudi Arabia

“…The range activity concentrations of 226 Ra, 232 Th and 40 K were less than the typical ranges of activity concentration in building materials reported by (UNSCEAR, 2008) as 100e500 and 40e350 and 1200e1800 Bq kg À1, respectively. As shown in Table 1, the radioactivity in granite samples varied from one sample to another; this depends on the nature of the region from which samples were collected (Harb, El-Kamel, El-Mageed, Abbady, & Rashed, 2014). The average values for all the three nuclides 226 Ra, 232 Th, and 40 K were 28.82, 34.83 and 665.08Bqkg-1 , respectively.…”

Assessment of Gamma Dose Rate at Mine Waste Dump

“…The effective annual dose of radiation is expressed in nSv/year. For the calculations we use the following formulas established by UNSCEAR [23] Calculated values Ra eq , D, E in , E ex was compared with the data presented in PAA report of 2011 year [24] and UNSCEAR 2000 [20]. Data in PAA report of 2011 year refer to the values measured on Polish territory with PMS station and IMiGW.…”

Natural radioactivity in common biscuits samples in Iraq

“…Equation 1 provides the specific activity (in Bq/kg), A Ei, of a nuclide having a peak at energy E [15]: where NP is the number of peaks determined in a particular peak area adjusted for background peaks of an energy Ei, and ε(Eγ) is the energy efficiency of the detection rate E, tc is the counting lifetime, Iγ (Eγ is how many gammas this nuclide emits during each disintegration during a transition with energy E, and here M is the observed sample's mass in the unit of kilograms. Radiation indices were calculated for the internal hazard index (IHI) and the radium equivalent activity (Raeq) (Hin).…”