Tez özetleri Astronomi ve Uzay Bilimleri Anabilim Dalı

Distribution Of Cesium-137 (Cs-137) İn South Marmara

Activity concentrations of ¹³⁷Cs which a fission product were determined in soil samples collected from 0-5 depth cm surface soil in the South of Marmara Region. Especially, effects of physicochemical characteristics of soil on retain ¹³⁷Cs were investigated.
The soil samples collected from 100 sampling stations were dried to constant weight, passed through a 2 mm sieve and settled in marinelli beakers. ¹³⁷Cs activity concentrations were measured of the gamma spectrometer. Furthermore, % organic matter, % clay, % silt, % sand contents and pH values of soil samples were measured. SPSS (Statistical Package for the Social Science) was used for evaluation of the results; and GIS (Geographical Information Systems) technique was used for mapping of ¹³⁷Cs activity concentrations.

It was observed that ¹³⁷Cs activity concentrations measured in this study are approximately equal to activities measured in various studies for this subject in the world. It is determined that organic matter and clay content and it has been confirmed that pH value being one of the physicochemical parameter of soil which is important for retaining ¹³⁷Cs in soil and it has been seen that the organic matter contained is the most effective parameter for retaining ¹³⁷Cs in soil.