Abstract
Abstract Related and periodical observations of air concentrations and the wet and dry eposition of a large number of radioactive nuclides from the Chernobyl accident have been made at Lund in southern Sweden. Measurements of dry deposition velocities of particles from the explosive first phase of the accident give particle diameters between 2 and 7.5 μm. The total deposition, dry and wet, is in good agreement with in situ measurements. Wet deposition and washout ratios have been calculated from measurements of activity concentrations of radioactive particles in both air and precipitation. A linear relation was found between activity in the air and in precipitation, ranging from μBq m −3 to Bq m −3 .
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