Determination of Natural Radioactivity Concentrations in Surface Soils in the Yesilirmak River in Amasya, Turkey

Abstract

In this study, natural radioactivity concentration in the surface soils along the Yesilirmak river in Amasya have been investigated. The activity concentrations of radionuclides of the Ra-226 and Th-232 decay chains and of the K-40 were determined by means of gamma-ray spectrometry measurements made using a 3 x 3 '' NaI(Tl) detector system. Concerning radiological risk, the absorbed gamma dose in air from those soils and the outdoor annual effective dose equivalent were calculated.