Natural radioactivity levels in granitic plutons and groundwaters in Southeast part of Eskisehir, Turkey.

Assessment of natural and anthropogenic radioactivity levels in rocks and soils in the environments of Juban town in Yemen

226Ra, 232Th and 40K concentrations in igneous rocks from eastern desert, Egypt and its radiological implications

Assessments of natural radioactivity and radiological hazards in construction materials used in Elazig, Turkey

Natural radioactivity in sand used in thermal therapy at the Red Sea Coast.

which traditional building materials are derived. These radionuclides pose exposure risks externally due to their gamma-ray emissions and internally due to radon and its progenies, which emit alpha particles. The activity concentration (Bq/kg) in igneous and metamorphic rock samples from different locations in Egypt and Germany has been analysed. The concentration values of samples for 226 Ra, 232 Th and 40 K were found in the range of 3.9 : 57.4, 3.2 : 53.4 and 202 : 1211 in Egypt and 5.1 : 76, 3.4 : 70 and 10 : 2070, respectively in Germany. Even though these radionuclides are widely distributed, their concentrations depend on the local geological conditions.

http://nopr.niscair.res.in/bitstream/123456789/8286/1/IJPAP%2044%283%29%20209-215.pdf

Comparative study of the natural radioactivity of some selected rocks from Egypt and Germany

The distribution of natural radionuclide γ-ray activities and their respective annual effective dose rates, produced by 40 K, 238 U, 226 Ra, 235 U and 232 Th, were determined for granite samples collected along the road of Idfu - Marsa Alam in eastern desert of Egypt. This subject is important in environmental radiological protection, since granites are widely used as building material. The variation in concentration of radionuclides for thirty granite samples was determined. A HPGe spectrometer was used for quantification of gamma emitting radionuclides in the sediments. All sediments contained radionuclides from the uranium and thorium series as well as 40 K. 238 U concentrations in the samples ranged (from 12.03±0.88 to 19.34±1.41 Bq.kg - 1 ), 235 U (from 1.16±0.11 to 4.83±0.44, Bq.kg -1 ), 226 Ra (from 9.69±0.82 to 18.97±1.33 Bq.kg -1 ), 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 ). Radium-equivalent activities (Raeq) in addition to the internal hazard index (Hin) have also been determined. Granite samples Raeq varies between 49.05 and 113.39 Bq.kg -1 . The total absorbed dose rates in air calculated from the concentrations of the three radionuclides ranged from 24.24 to 58.05 nGy.h -1 and the external annual effective dose rate of the areas were determined to be between 0.12 and 0.28 mSv.y -1 . The results can be considered as base values for distribution of natural radionuclides in the region and will be used as reference information to assess any changes in the radioactive background level due to geological processes.

Concentration of u-238, u-235, ra-226, th-232 and k- 40 for some granite samples in eastern desert of egypt.

Estimation of radiation hazard indices from natural radioactivity of some rocks

The aim of this study is to determine the transfer factor soil-to-plant and to assess the concentration level of natural and artificial radionuclide (238U, 226Ra, 228Ra, 232Th, 40K and 137Cs) in samples from Saluga and Ghazal Protectorate area in Aswan, Egypt, by using High Pure Germanium detector (HPGe) Environmental Radioactivity Measurements Labrotary in faculty of science Qena. Reported values for natural radionuclides ranged from 8.81 ± 0.64 to 28.88 ± 2.10, from 6.98 ± 0.51 to 26.01 ± 1.89, from 12.29 ± 0.89 to 33.32 ± 2.43, from 12.53 ± 0.91 to 32.81 ± 2.39 and from 383.90 ± 27.95 to 711.98 ± 51.83 Bq.kg-1 for 238U, 226Ra, 228Ra, 232Th and 40K, respectively. 137Cs activity concentration was found to be in the range from 0.36 ± 0.03 to 9.73 ± 0.71 Bq.kg-1 and was calculated through transfer factor TF reported in this article.

/pdf/radioactivity-levels-and-soil-to-plant-transfer-factor-of-3kl19g827h.pdf

A. H. El-Kamel

Papers

Assessment of natural and anthropogenic radioactivity levels in rocks and soils in the environments of Juban town in Yemen

Comparative study of the natural radioactivity of some selected rocks from Egypt and Germany

Concentration of u-238, u-235, ra-226, th-232 and k- 40 for some granite samples in eastern desert of egypt.

Estimation of radiation hazard indices from natural radioactivity of some rocks

Radioactivity Levels and Soil-to-Plant Transfer Factor of Natural Radionuclides from Protectorate Area in Aswan, Egypt