Gross-alpha and gross-beta activities in airborne particulate samples. Analysis and prediction models

Measurements of gross-alpha and gross-beta activities were made every week during the years 1992-1997 for airborne particulate samples collected using air filters at a clear site. The data are sufficiently numerous to allow t he examination of variations in time and by these measurements to establish several features that should be important in understanding any trends of a tmospheric radioactivity. Two models were used to predict the gross-alpha a nd gross-beta activities. A good agreement between the results of these mod els and the measurements was highlighted. (C) 2001 Elsevier Science Ltd. Al l rights reserved.