title: Radioactivity concentrations in soil and dose assessment for Samsun city centre, Turkey.
abstract: In this study, natural gamma radioactivity levels were determined in the soil samples of the Samsun city centre by using the gamma ray spectrometry method. The analysis carried out with the high-purity germanium gamma spectrometry system has shown that average activity concentrations of (238)U, (232)Th, (40)K and (137)Cs were 19±2, 22±4, 521±23 and 15±1 Bq kg(-1), respectively. From the gamma analysis of soil samples, the average value of the absorbed gamma dose rates in air and the average value of the external annual effective dose rates were calculated as 45±4 nGy h(-1) and 55±5 µSv y(-1), respectively. The external hazard index has also been calculated and it has been found that the radiation hazard in Samsun is insignificant.
authors.affiliation: Department of Physics, Faculty of Sciences and Arts,  Ondokuz Mayıs University, 55139 Samsun,  Turkey.
authors.forename: Mustafa Çağatay
authors.initials: MÇ
authors.lastname: Tufan
authors.forename: Selma
authors.initials: S
authors.lastname: Bostancı
mesh_terms: D001417:Background Radiation; D002588:Cesium Radioisotopes / Q000032:analysis*; D005720:Gamma Rays; D006801:Humans; D011197:Potassium Radioisotopes / Q000032:analysis*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000379:methods*; D012990:Soil Pollutants, Radioactive / Q000032:analysis*; D013051:Spectrometry, Gamma; D013910:Thorium / Q000032:analysis*; D014421:Turkey; D014501:Uranium / Q000032:analysis*
chemical_list: D002588:Cesium Radioisotopes; D011197:Potassium Radioisotopes; D012990:Soil Pollutants, Radioactive; D014501:Uranium; D013910:Thorium