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Soil samples from Novi Pazar (Serbia) and Rožaje (Montenegro) were analyzed by the ORTEC HPGe detectors with relative efficiencies of 35 and 40 % for radioactivity of 226Ra, 232Th/228Ac, 40K and 137Cs. An average radioisotope activity concentration for Novi Pazar soil was found to be 27.6, 49.5, 585 and 14.9 Bq/kg, respectively; while in Rožaje, 13...
Context in source publication
Context 1
... territories of Novi Pazar (Serbia) and Rožaje (Montenegro) make a borderland between Serbia and Montenegro (illustrated in Fig. 1). Novi Pazar (N. Pazar) municipality has an area of 742 km 2 and population of 109 327 -based on the Census in 2011, but unofficial information confirm that the population is over 120 000 [1]. On the other hand, Rožaje municipality with an area of 432 km 2 and population of 22 964 (from the Census in 2011) contributes with around 3.13 ...
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Citations
... Uzorkovanje zemljišta 2013. godine sa 11 mernih tačaka (u gradskom jezgru, Novopazarskoj Banji i Izbicama) i merenje dominantno prisutnih prirodnih radionuklida ( 226 Ra, 232 Th, 40 K) i 137 Cs, poslužilo je da se prethodno procene jačina apsorbovane doze i odgovarajuća godišnja efektivna doza, a zatim i rizik po zdravlje ljudi usled spoljašnjeg terestrijalnog zračenja (outdoors) (videti [8,9]). Terenskim istraživanjem 2012. ...
... Terenskim istraživanjem 2012. godine, kako je prethodno pomenuto, i dodatnim uzorkovanjem izvršenim u naredne dve godine, sakupljeni su i gama-spektrometrijski mereni izabrani biotski uzorci [8][9][10]. Naime, za uzorke faune površinskih slojeva zemljišta izabrana je najkrupnija hilopoda u Srbiji, stonoga Scolopendra cingulata Latreille, 1829. ...
... (1) gde je N/t -neto brzina brojanja pod pikom totalne apsorpcije 662 keV, ε -(foto)efikasnost, I -intenzitet gama zraka (0,851), m -masa uzorka. Ista procedura korišćena je i za određivanje koncentracija aktivnosti prirodnih radionuklida 40 K, produkata raspada 226 Ra i 232 Th (analizom pikova na energijama 1461 keV, 609 keV i 911 keV, respektivno) [9]. Jačina apsorbovane doze u vazduhu, na 1 m visine iznad tla, a na osnovu koncentracija aktivnosti radionuklida u površinskom sloju zemljišta, procenjena je pomoću: ...
This paper deals with 137Cs activity concentrations in samples from the territory of Novi Pazar (town core, Novopazarska Banja, Izbice). The measurements have been performed in 2013-2016 using standard gamma spectrometry (HPGe) procedures, and included samples of soil (11 locations), 11 individuals of centipede (Scolopendra cingulata), vegetables (potato, onion), fruit (apple), as well as “tree of heaven” Ailanthus altissima and pine Pinus sylvestris. The levels of concentration/transfer factors for animal and plant species were evaluated, together with corresponding radiation dose rate caused by 137Cs, and its contribution to the total dose rate. All the samples showed relatively low level of 137Cs. Its contribution to the total external terrestrial gamma absorbed dose rate at 1 m in air at 11 measuring points did not exceed 11%, while the annual effective dose caused by gamma radiation of 226Ra, 232Th, 40K and 137Cs found to be with an average of ∼0.08 mSv y-1, i.e., slightly higher than the global average annual effective dose from natural radiation sources – external terrestrial radiation, outdoors. The external irradiation of the considered animal and plant species by the activity in soil was found to be dominant, and significantly higher than internal exposure to incorporated 226Ra, 232Th, 40K and 137Cs. A contribution of natural radionuclides to the total dose rate is many folds higher than that of 137Cs. At the same time, upper levels of the total dose rates (external and internal exposure) of S. cingulata, A. altissima and P. sylvestris to the terrestrial radionuclides, are significantly below the threshold doses for terrestrial animals and plants (1 and 10 mGy d-1, respectively).
