Etude de la radioactivité artificielle fixée sur les noyaux de condensation atmosphériques au niveau du sol

Abstract

The technics established for the study of Radon and Thoron daughters were applied to the determination of y activity on particles of a radius below 2.10V cm at ground level. Long time samplings were used and the collections were measured with a y multichannel spectrometer.Our experimental results allow us to verify that y activity fixed on particles with radii below 2.10-6 cm represents an average of 16 % of the total artificial radioactivity.