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Radiation Protection Dosimetry 2004 109(3):197-199; doi:10.1093/rpd/nch321
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Radiation Protection Dosimetry Vol. 109 No. 3 © Oxford University Press 2004; all rights reserved

Influence of variability of 214Pb recoil factor on lung dose

D. Nikezic* and N. Stevanovic

Faculty of Science, University of Kragujevac, R. Domanovic 12, 34000 Kragujevac, Serbia and Monte Negro

* Corresponding author: nikezic{at}kg.ac.yu

Different parameters enter models of the human respiratory tract. The unattached fraction of the radon progeny was identified as the most important parameter, with the strongest influence on lung dose. The unattached fraction depends on the indoor aerosol concentration and other environmental conditions. The recoil factor, , which influences the unattached fraction of 214Pb and 214Bi, defined as the average detachment probability from the aerosol after an alpha decay of 218Po, has almost always been taken as a constant. Here the recoil factor was recalculated under different assumptions and found to be in the range between 0.1 and 0.8. A smaller recoil factor means lower unattached fractions of 214Pb and 214Bi. The influence of the recoil factor on lung dose was also estimated. The lung dose is smaller by about 10% if is assumed in calculating the unattached fraction instead of .


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D. Nikezic and N. Stevanovic
Room model with three modal distributions of attached 220Rn progeny and dose conversion factor
Radiat Prot Dosimetry, January 1, 2007; 123(1): 95 - 102.
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