@misc{oai:repo.qst.go.jp:00068370,
 author = {Uchida, Shigeo and Tagami, Keiko and Ruhm, Werner and Steiner, M. and Wirth, Erich and 内田 滋夫 and 田上 恵子},
 month = {Sep},
 note = {Technetium-99 is a pure beta emitter (Emax=0.29keV) and its radiological half-life is 2.1 x 10 5
y. This nuclide is one of the most important radionuclides for dose assessment because of its
high mobility in soil and availability to plants. The most stable chemical form under natural
surface water conditions is TcO4 - , which is highly soluble and rarely adsorbed onto soil
particle surfaces. The chemical form of Tc, however, changes with environmental conditions.
Thus it is necessary, for realistic assessment, to obtain transfer parameters, such as soil-to-plant
transfer factors (TFs), under natural conditions, but the data have been limited due to
trace levels of 99 Tc. Obtaining TFs using global fallout 99 Tc in fields is difficult, because the
concentration of 99 Tc is very low. Therefore, we focused on the Chernobyl site where 99 Tc
concentration levels have already been shown to be higher than those from global fallout Tc
(Uchida et al., 1999).
In this study, we determined the concentrations of 99 Tc in soils and plant leaves collected near
the Chernobyl site to investigate the transfer of the nuclide in soil-plant systems under natural
conditions., International Conference on Radioactivity in the Environment},
 title = {Measurement of Chernobyl fallout technetium-99 in plant samples and its transfer in soil-plant systems},
 year = {2002}
}