Аннотация:The features in the redistribution of 137Cs and its chemical analog 39K in the structures of the main forest forming tree species (pine and birch) of Bryansk’s woodlands in the remote period after the Chernobyl fallout are considered. The dynamics of the specific activity of 137Cs in these structures is analyzed. Some differences in the redistribution of 137Cs and 39K in the components of pine and birch, as well as their long_term dynamics, were revealed.