On the radioecology of the River Danube - a new approach for dating solid particles
Maringer, F. J.; Jachs, P.
Results are presented from current research on the characterisation of the moment in time when solid particles entering surface waters are formed, based on radioecological investigations of some artificial and natural radionuclides (Be-7, Cs-137, Pb-210). These radionuclides imprint a radiometric time-stamp on solid particles when they are washed from soils into surface waters. Due to the special mineralogical composition of the particles, strong binding mechanisms between the radionuclides and the solids conserve the event marker throughout the transport phase in the surface-water environment. When evaluating radiometric data from samples of solid particles, ecological parameters that influence their distribution must be taken into account, the most important being grain size distribution. These interactions and the general possibilities and limits for using this new dating concept are discussed.