Activity concentrations of 238U and 232Th in some soil and fertilizer samples using passive and active techniques

El-Farrash, A. H.; Yousef, Hesham A.; Hafez, A.F.

doi:10.1016/j.radmeas.2012.06.024

Cited by 15 publications

(12 citation statements)

References 11 publications

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“…Finally, the detectors were washed again with distilled water and dried. The alpha tracks were then counted using an optical microscope at a magnification of 640x, taking into consideration the background [4]. Radon concentrations C Rn were calculated in (kBqm -3 ) by the following equation:…”

Section: Introductionmentioning

confidence: 99%

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Environmental Radioactivity of Radon and its Hazards in Hamash Gold Mine, Egypt

Saleh

Yousef

Mitwalli

et al. 2019

Arab Journal of Nuclear Sciences and Applications

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Radon concentrations have been measured using Sealed Can Technique with CR-39 detector for twenty collected samples from Hamash gold mine area, South Eastern Desert of Egypt. This area is one of the most important areas of gold-bearing granites in Arabian Nubian Shield and is being used as a gold mine. The average values of radon concentrations, the exhalation rates, annual effective doses, and working levels are found to be 27.18 ± 0.13 kBqm-3 , 3.27 ± 0.03 Bqm-2 h-1 , 686.27 ± 5.15 mSvy-1 and 2.94 ± 0.02 respectively. The results indicate that the radon concentrations in all samples are higher than the recommended world limit given by ICRP and IAEA. The present study can be used to assess any changes in the radioactive background and any harmful radiation effect on the human in this area. Finally, the obtained data are useful when building a radioactivity atlas of radon for Hamash gold mine and its surrounding region.

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Section: Introductionmentioning

confidence: 99%

“…Where F = 0.4 the indoor equilibrium factor between radon and its progeny, H is the indoor occupancy factor (0.8), D is the dose conversion factor (9×10 -6 mSvh -1 / Bqm -3 ) and T is the indoor exposure time equal to 7000 hy −1 [2,4].…”

Section: Introductionmentioning

confidence: 99%

Environmental Radioactivity of Radon and its Hazards in Hamash Gold Mine, Egypt

Saleh

Yousef

Mitwalli

et al. 2019

Arab Journal of Nuclear Sciences and Applications

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“…The spectra have been analyzed with Genie-2000 version 3.1 software, including the gamma analysis option. The gamma-emitting nuclides library has been designed to assess the activity concentration for radionuclides belonging to the natural series of Uranium and thorium, as 208 Tl, 212 Bi, 212 Pb, 214 Bi, 214 Pb, 226 Ra, 228 Ac, 234 Th, 235 U, and 40 K [5,[26][27][28][29][30][31][32], respectively. The efficiency calibrations used have been conducted using a multi-nuclide standard solution and identical source containers similar to those used for the analysis of the samples.…”

Section: Experimental Techniquementioning

confidence: 99%

Environmental Radioactivity Monitoring Using High Resolution Gamma-ray Spectrometer for Lake Manzala in Egypt

MITWALLI

DULAMA²,

Sallah

et al. 2022

Arab Journal of Nuclear Sciences and Applications

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The environmental radioactivity of the Lake Manzala, Egypt, has been investigated to determine the level of the natural radioactivity and the radiological impact for the targeted area. Twenty sediment samples were collected from pre-determined locations, which involve deep springs and lakes, particularly samples taken from places receiving sewage pollutants, fertilizers and disinfection materials used in the agricultural area and fish farms. The gamma-emitting nuclides library has been designed to assess the activity concentration for radionuclides belonging to the natural series of uranium and thorium ( 208 Tl, 212 Bi, 212 Pb, 214 Bi, 214 Pb, 226 Ra, 228 Ac, 234 Th, 235 U), and 40 K gamma-line. The measured overall average value of the radionuclides' activity concentration was 15 Bq/kg, while for 40 K was 286 Bq/kg. The true coincidence summing was corrected using the Genie-2000 software, and LabSOCS was used to calculate the total efficiencies. Most of the resulted values are moderated, indicating normal levels compared to the international and worldwide reference values in this regard.

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“…C is the radon concentration (Bqm -3 ), V is the effective volume of Can (m 3 ), A is the cross-sectional area (m 2 ), and T is the initializing irradiation period (27 days) [16][17][18].…”

Section: Rnmentioning

confidence: 99%

“…Where A is the conversion factor of the annual effective dose (9×10 -6 mSvh -1 / Bqm -3 ), H is the indoor occupancy factor (0.8), F=0.4 is the indoor equilibrium factor between radon and its progeny [4,11,[19][20][21], and T is the indoor exposure time in hours per year which equals 2000 hy −1 [4,18].…”

Section: Rnmentioning

confidence: 99%

Radon Measurement and Radiological Dose Assessment From Terrestrial Rocks Using Solid-State Nuclear Track Detectors

MITWALLI

BADWAY²,

YOSEF³

et al. 2022

Arab Journal of Nuclear Sciences and Applications

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The Sukari granitoid pluton, namely the Sukari gold mine (SGM), located in Egypt's southeastern desert, is outstanding gold-bearing granite in the Arabian Nubian Shield. CR-39 and LR-115 Nuclear Track Detectors (NTD) were used in the present study to determine radon concentration, after which the exhalation rate, annual effective dose, and work level were calculated. The overall average radon values from the CR-39 and LR-115 NTD are 11.27 and 11.29 kBqm -3 , respectively, indicating a consensual correlation that depends on the charged particles, particularly accumulation radon gas emissions from investigated samples measured by Nuclear Track Detectors. The findings revealed a significant quantity of NORM in the SGM due to the radon concentration which is greater than the IAEA, ICRP, and UNSCEAR recommended limit of 1000 Bqm -3 . The present study aims to evaluate and predict the radioactive changes in the investigation area, assess dangerous radiation, and implement radiation safety standards for the workers in the SGM. The current research may also be useful in the future investigation and mining of nuclear materials for optimization business in the SGM and its surrounding area.

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Activity concentrations of 238U and 232Th in some soil and fertilizer samples using passive and active techniques

Cited by 15 publications

References 11 publications

Environmental Radioactivity of Radon and its Hazards in Hamash Gold Mine, Egypt

Environmental Radioactivity of Radon and its Hazards in Hamash Gold Mine, Egypt

Environmental Radioactivity Monitoring Using High Resolution Gamma-ray Spectrometer for Lake Manzala in Egypt

Radon Measurement and Radiological Dose Assessment From Terrestrial Rocks Using Solid-State Nuclear Track Detectors

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