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Inter-comparison of absorbed dose rates for non-human biota

Vives i Batlle J, Balonov MI, Beaugelin-Seiller K, Beresford NA, Brown J, Cheng J, Copplestone D, Doi M, Filistovic V, Golikov V, Horyna J, Hosseini A, Howard BJ, Jones SR, Kamboj S, Kryshev AI, Nedveckaite T, Prohl G, Sazykina T, Ulanovsky AV, Vives Lynch S, Yankovich TL, Yu C & Olyslaegers G (2007) Inter-comparison of absorbed dose rates for non-human biota, Radiation and Environmental Biophysics, 46 (4), pp. 349-373.

A number of approaches have been proposed to estimate the exposure of non-human biota to ionizing radiation. This paper reports an inter-comparison of the unweighted absorbed dose rates for the whole organism (compared as dose conversion coefficients, or DCCs) for both internal and external exposure, estimated by 11 of these approaches for selected organisms from the Reference Animals and Plants geometries as proposed by the International Commission on Radiological Protection. Inter-comparison results indicate that DCCs for internal exposure compare well between the different approaches, whereas variation is greater for external exposure DCCs. Where variation among internal DCCs is greatest, it is generally due to different daughter products being included in the DCC of the parent. In the case of external exposures, particularly to low-energy β-emitters, variations are most likely to be due to different media densities being assumed. On a radionuclide-by-radionuclide basis, the different approaches tend to compare least favourably for 3H, 14C and the α-emitters. This is consistent with models with different source/target geometry assumptions showing maximum variability in output for the types of radiation having the lowest range across matter. The intercomparison demonstrated that all participating approaches to biota dose calculation are reasonably comparable, despite a range of different assumptions being made.

AuthorsVives i Batlle Jordi, Balonov Mikhail I, Beaugelin-Seiller Karine, Beresford Nicholas A, Brown Justin, Cheng Jing-Jey, Copplestone David, Doi Masahiro, Filistovic Vitold, Golikov Vladislav, Horyna Jan, Hosseini Ali, Howard Brenda J, Jones Steve R, Kamboj Sunita, Kryshev Alexander I, Nedveckaite Tatjana, Prohl Gerhard, Sazykina Tatiana, Ulanovsky Alexander V, Vives Lynch Sandra, Yankovich Tamara L, Yu Charley, Olyslaegers Geert
Publication date11/2007
ISSN 0301-634X

Radiation and Environmental Biophysics: Volume 46, Issue 4 (NOV 2007)

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