Yazar "Mirekhtiary, Fatemeh" seçeneğine göre listele

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    The effect of face masks on the filtration rate of Radon (222Rn) gas and its progeny in breathing air
    (Springer, 2023) Abbasi, Akbar; Tulucu, Fadime; Almousa, Nouf; Mirekhtiary, Fatemeh; Zakaly, Hesham M. H.
    The blocking effect of Rn-222 gas and its progeny by various face masks has been determined using a measurement system with a parallel AlphaGUARD detector. The theoretical approach of diffusion rate for different particle sizes was calculated. The filtering effect of the different masks followed the order N99 > surgical > N95 > double cloth > double cellulose > cloth > cellulose masks, respectively. Overall the blocking effect percentage ranged between 7.65 and 22.66%. The study indicated that the effect of a mask with high quality in filtering the gas of Rn-222 and its decay products is more than the double-layer masks.
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    The seasonal variation of ambient gamma radiation dose rate and health risk assessment in North Coast, Mediterranean Sea
    (Springer, 2023) Abbasi, Akbar; Zakaly, Hesham M. H.; Bashiry, Vali; Alrowaily, Albandari W.; Mirekhtiary, Fatemeh
    In this research, the seasonal variations of ambient gamma radiation dose rate and the outdoor gamma radiation risk in the northeast location of Cyprus were investigated by means of an Ion Chamber Survey Meter. The ambient gamma radiation was measured at 100 cm above ground level. The average value of measured ambient gamma dose was 135 nGyh-1, 185 nGyh-1, 187 nGyh-1 and 191 nGyh-1 in winter, autumn, spring, and summer, respectively. The excess lifetime cancer risk (ELCR) values at the tested sites were higher than the worldwide average.
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    U-238, Th-232 series, and Pu-239+Pu-240 concentration analysis in biological samples of high natural background radiation residents by alpha spectrometry
    (Springer, 2023) Abbasi, Akbar; Mirekhtiary, Fatemeh; Alrowaily, Albandari W.; Zakaly, Hesham M. H.
    The purpose of this research was to determine the isotope concentration of the actinide radioelements U-238, Th-232 series, and Pu-239 in biological samples (urine) using the alpha spectroscopy system. The samples were selected from the residence of high natural background radiation (HNBR) area and analyzed using chemical procedure. The separated sample was placed on a membrane filter by the sedimentation method, and it was prepared for counting with the alpha spectrometry system. The average radioactive concentrations found in these samples were as follows: U-234 > Ra-226 > Th-230 > Ra-228 > Th-228 > Ra-224 > Th-232 > Pu-239. The average concentrations of U-234 and Ra-226 were much greater than the other radionuclides.