Resuspension processes controll variations of Cs activity concentrations in the ground-level air.

Autor: Sýkora, I., Povinec, P., Brest'áková, L., Florek, M., Holý, K., Masarik, J.
Předmět:
Zdroj: Journal of Radioanalytical & Nuclear Chemistry; Aug2012, Vol. 293 Issue 2, p595-599, 5p, 3 Graphs
Abstrakt: The Cs activity concentration in the surface air between 1977 and 2007 was decreasing with an ecological half-life of 3.4 years, however, during 2007-2010 the yearly averaged Cs activity concentrations were almost constant. The increased atmospheric Cs and K levels observed during the winter may be due to surface soil resuspension and radionuclide transport by winds, particularly from open agricultural areas, as confirmed by high correlation coefficient between Cs and K atmospheric levels (R = 0.84), and similar Cs/K activity ratios in aerosols (0.07) and soils (0.05). [ABSTRACT FROM AUTHOR]
Databáze: Complementary Index