Population doses from terrestrial gamma exposure in areas near to old phosphate mine, Russaifa, Jordan

Al-Jundi, J.

doi:10.1016/s1350-4487(01)00261-x

Cited by 76 publications

(26 citation statements)

References 21 publications

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“…The mean activity concentrations at the other sites (the complex building, old landfill and recent landfill) were higher than the world average value for soil (up to four orders of magnitude in the old landfill site). The results were expected, since the landfill area is an old phosphate mine with higher uranium activity concentrations than 'normal' soil sites (Al-Jundi, 2002). The measured activity concentrations of 232 Th and 40 K were in good agreement with the world average values mentioned above.…”

Section: Radioactivity Concentrationssupporting

confidence: 83%

Radioactivity and elemental analysis in the Ruseifa municipal landfill, Jordan

Al-Jundi

Al-Tarazi

2008

Journal of Environmental Radioactivity

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Section: Radioactivity Concentrationssupporting

confidence: 83%

Radioactivity and elemental analysis in the Ruseifa municipal landfill, Jordan

Al-Jundi

Al-Tarazi

2008

Journal of Environmental Radioactivity

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“…Due to the possible disequilibrium between 238 U and 226 Ra, the activity of 238 U was evaluated from all the lines in the spectrum which originate from the isotopes in this series. Since in each of our samples the activity of 238 U, as deduced from all the lines, gave consistent values within the uncertainties of their intensities, which justifies the assumption of unperturbed equilibrium in the series, the final results were based on gamma-ray lines of 214 Bi at 609.3, 1,120.3, and 1,764.5 keV, which yield the highest statistical accuracy (Hamby and Tynybekov 2002;Al-Jundi 2002;Tzortzis and Tsertos 2004;Dragović et al 2005). The specific activity of 232 Th was evaluated from gamma-ray lines of 228 Ac at 338.4, 911.1, and 968.9 keV.…”

Section: Radioactivity Measurementsmentioning

confidence: 54%

Distribution of natural radionuclides in surface soils in the vicinity of abandoned uranium mines in Serbia

Momčilović

Kovačević²,

Tanic³

et al. 2012

Environ Monit Assess

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The activity concentrations of natural radionuclides in soils from the area affected by uranium mining at Stara Planina Mountain in Serbia were studied and compared with the results obtained from an area with no mining activities (background area). In the affected area, the activity concentrations ranged from 1.75 to 19.2 mg kg(-1) for uranium and from 1.57 to 26.9 mg kg(-1) for thorium which is several-fold higher than those in the background area. The Th/U, K/U, and K/Th activity ratios were also determined and compared with data from similar studies worldwide. External gamma dose rate in the air due to uranium, thorium, and potassium at 1 m above ground level in the area affected by uranium mining was found to be 91.3 nGy h(-1), i.e., about two-fold higher than that in background area. The results of this preliminary study indicate the importance of radiological evaluation of the area and implementation of remedial measures in order to prevent further dispersion of radionuclides in the environment.

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“…A total of 28 samples have been collected (Table 1) which represent the predominant rock formations of Cyprus * . Measured samples were sieved through 0.2-mm mesh, sealed in standard 1000 ml Marinelli beakers, dryweighed and stored for at least four weeks before counting in order to allow the in-growth of uranium and thorium decay products and achievement of equilibrium for 238 U and 232 Th with their respective progeny (Hamby and Tynybekov, 2000;Al-Jundi, 2002). However, significant disequilibrium is uncommon in rocks older than 10 6 years, and the 232 Th series may be considered in equilibrium in most geological environments (Chiozzi et al, 2002).…”

Section: Sample Collection and Countingmentioning

confidence: 99%

“…The results obtained in each country can be exploited to enrich the world's data bank, which is highly needed for evaluating worldwide average values of radiometric and dosimetric quantities (Al-Jundi, 2002). …”

Section: Introductionmentioning

confidence: 99%

Gamma-ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks

Tzortzis

Tsertos

Christofides

et al. 2003

Radiation Measurements

222

106

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Using high-resolution γ−ray spectroscopy, the terrestrial gamma radiation in all the predominant types of geological rock formations appearing in Cyprus was measured. Soil samples were collected from each rock type, sealed in 1-litre plastic Marinelli beakers, and measured in the laboratory for 24 hours each. From the measured γ−ray spectra, activity concentrations were determined for 232 Th (range from 1.3 to 52.8 Bq kg −1 ), 238 U (from 0.9 to 90.3 Bq kg −1 ) and 40 K (from 13 to 894 Bq kg −1 ). Elemental concentrations mean values of (2.8 ± 0.7) ppm, (1.3 ± 0.3) ppm and (0.6 ± 0.1) % were extracted, for thorium, uranium and potassium, respectively. Absorbed dose rates in air outdoors were calculated to be in the range of 0.1−50 nGy h −1 , depending on the geological features, with an overall mean value of (14.7 ± 7.3) nGy h −1 . The corresponding effective dose rates per person outdoors were estimated to be between 0.1 and 61.4 µSv y −1 , assuming a 20% occupancy factor.

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Population doses from terrestrial gamma exposure in areas near to old phosphate mine, Russaifa, Jordan

Cited by 76 publications

References 21 publications

Radioactivity and elemental analysis in the Ruseifa municipal landfill, Jordan

Radioactivity and elemental analysis in the Ruseifa municipal landfill, Jordan

Distribution of natural radionuclides in surface soils in the vicinity of abandoned uranium mines in Serbia

Gamma-ray measurements of naturally occurring radioactive samples from Cyprus characteristic geological rocks

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