Badania promieniotwórczości gamma na obszarze Polski: efekt Czarnobyla, skażenia przemysłowe, promieniotwórczość naturalna

Ryszard Strzelecki, Jan Szewczyk, Stanisław Wołkowicz, Zbigniew Jędrzejczak

Abstrakt


GAMMA-RADIOACTIVITY MEASUREMENTS IN POLAND: CZERNOBYL EFFECT, INDUSTRIAL POLLUTION, NATURAL RADIOACTIVITY

Summary
First gamma-ray spectrometric measurements running along 21°30' have been performed in Poland in 1991. Worked-out methodology permits to registrate the natural radioactivity related to isotopes of the uranium - thorium serie and K - isotope as well as to Cs-137 radioactivity originating from Czernobyl catastrophe. Obtained results show a variable concentration of the above metioned isotopes. Observed in the southern part of the profile line, running across Carpathians, relatively high radiation despite low cesium content is the result of higher concentration of natural radioactive elements in the rocks occurring over the area. In the northern part of the profile, especially in the area between Wyszków and Nida Lake, numerous cesium anomalies have been registrated, however, in respect to the low natural total background, the total radioactivity rarely exceeds the values characteristic for the Carpathian part of the profile. The presence of higher radioactivity in the sediments of Vistula river flood terrace is an interesting evenement interpreted by the authors as the result' of accumulation of radioactive elements, mainly of uranium, delivered to Vistula from the waters of the Upper Silesian coal mines.