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Bode K.T.,Institute of Applied Nuclear Physics | Bylyku E.,Institute of Applied Nuclear Physics | Xhixha G.,National Institute of Nuclear Physics, Italy | Daci B.,Institute of Applied Nuclear Physics | Fishka K.,Institute of Applied Nuclear Physics
Journal of Radioanalytical and Nuclear Chemistry | Year: 2015

This study reports the activity concentration of 210Po in mussels (Mytilus galloprovincialis) from Butrinti Lagoon. The concentrations of 210Po in mussels collected in spring are found to be approximately twice higher than those collected in autumn, respectively 389.5 ± 16.9 and 227.4 ± 5.0 Bq kg−1 (d.w.). Hypothesis on factors affecting 210Po concentration in mussels are raised based on available studies. The annual effective ingestion dose due to 210Po intake was found to be comparable to other studies and varying from 74.2 ± 3.4 to 36.5 ± 1.0 lSv y−1. © 2015, Akadémiai Kiadó, Budapest, Hungary. Source


Cfarku F.,Institute of Applied Nuclear Physics | Xhixha G.,Agricultural University of Tirana | Bylyku E.,Institute of Applied Nuclear Physics | Zdruli P.,CIHEAM Mediterranean Agronomic Institute of Bari | And 6 more authors.
Journal of Radioanalytical and Nuclear Chemistry | Year: 2014

A pilot study involving screening measurements of gross alpha/beta activity concentration in drinking water was performed in 12 cities with the highest population density in Albania. The aim of this study was to develop a first insight regarding the radiological quality of drinking and bottled water supplies. The tap and bottled water samples investigated are acceptable for consumption, complying with the WHO recommendations for drinking water. The average gross alpha and beta activity concentrations were 36+37 -18 and 269+337 -150 mBq/L, respectively in tap waters. While for bottled water the gross alpha and beta activities were respectively 39+55 -23 and 220+336 -132 mBq/L. The data obtained can provide information for authorities regarding the quality of drinking water and a baseline for future contaminations. © 2014 Akadémiai Kiadó. Source


Hasani F.,Kosovo Agency for Radiation Protection and Nuclear Safety KARPNS | Shala F.,University of Prishtina | Xhixha G.,National Institute of Nuclear Physics, Italy | Xhixha M.K.,University of Ferrara | And 4 more authors.
Journal of Environmental Radioactivity | Year: 2014

The energy production in Kosovo depends primarily on lignite-fired power plants. During coal combustion, huge amounts of fly ash and bottom ash are generated, which may result in enriched natural radionuclides; therefore, these radionuclides need to be investigated to identify the possible processes that may lead to the radiological exposure of workers and the local population. Lignite samples and NORMs of fly ash and bottom ash generated in lignite-fired power plants in Kosovo are analyzed using a gamma-ray spectrometry method for the activity concentration of natural radionuclides. The average activity concentrations of 40K, 226Ra and 232Th in lignite are found to be 36 ± 8 Bq kg-1, 9 ± 1 Bq kg-1 and 9 ± 3 Bq kg-1, respectively. Indications on the occurrence and geochemical behavior of uranium in the lignite matrix are suggested. The activity concentrations of natural radionuclides in fly ash and bottom ash samples are found to be concentrated from 3 to 5 times that of the feeding lignite. The external gamma-ray absorbed dose rate and the activity concentration index are calculated to assess the radiological hazard arising from ash disposal and recycling in the cement industry. © 2014 Elsevier Ltd. Source


Xhixha G.,National Institute of Nuclear Physics, Italy | Alberi M.,University of Ferrara | Baldoncini M.,University of Ferrara | Bode K.,Institute of Applied Nuclear Physics | And 10 more authors.
Journal of Radioanalytical and Nuclear Chemistry | Year: 2015

The feasibility of using certified reference materials for the full energy efficiency calibration of p-type coaxial high-purity germanium detectors for the determination of radioactivity in environmental samples is discussed. The main sources of uncertainty are studied and the contributions to the total uncertainty budget for the most intense gamma lines are presented. The correction factors due to self-absorption and true coincidence summing effects are discussed in detail. The calibration procedure is validated for natural and artificial radionuclide determination in different matrices through an internal cross-validation and through the participation in a world-wide open proficiency test. © 2015 Akadémiai Kiadó, Budapest, Hungary Source

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