Bulg. J. Phys. vol.34 no.s1 (2007), pp. 059-064

Systematical Investigations of 137Cs Concentration in Soils in Bansko-Razlog Region

L. Kostov, R. Kobilarov, L. Kostova, Ml. Mladenov, Ch. Protochristov, Ch. Stoyanov
Institute for Nuclear Research and Nuclear Energy, Bulgarian Academy of Sciences, Tsarigradsko Chaussee 72, BG-1784, Sofia, Bulgaria
Abstract. Systematical investigations of Cs-137 concentration in soil in Bansko-Razlog region have been performed for the first time. A total area of about 40 km2 has been investigated. By means of high-resolution gamma-ray spectroscopy the radio-nuclide content of the soil samples has been determined. The Cs-137 deposition density following the Chernobyl accident has been estimated and compared with the results obtained in other countries. The additional dose rate caused by this fallout has also been estimated.

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