title: Distribution of radiocesium and natural gamma emitters in pine needles in coniferious forest sites of Izmir.
abstract: Using a high-resolution gamma-spectrometer system, the activity concentrations of 7Be, 137Cs, 40K and 226Ra were determined in the pine needles. Activity concentrations of the concerned radionuclides in the needle samples were as follows: 7Be, 24.6+/-2.40 to 210+/-7.21 Bq kg(-1), 40K, 23.5+/-12.4 to 287+/-15.6 Bq kg(-1), 226Ra, 0.44+/-0.12 to 12.3+/-2.18 Bq kg(-1), and 137Cs, 0.61+/-0.30 to 2.29+/-0.38 Bq kg(-1). It is found that the frequency distributions obtained for 7Be and 137Cs can be fitted to a normal distribution, and for 40K and 226Ra can be fitted to a log-normal distribution.
authors.affiliation: Physics Department, Faculty of Arts and Science, Dokuz Eylül University, 35160 Tinaztepe, Izmir, Turkey. ozlem.karadeniz@deu.edu.tr
authors.forename: O
authors.initials: O
authors.lastname: Karadeniz
authors.forename: G
authors.initials: G
authors.lastname: Yaprak
mesh_terms: D001608:Beryllium / Q000032:analysis; D002588:Cesium Radioisotopes / Q000032:analysis*; D005720:Gamma Rays; D028223:Pinus / Q000737:chemistry*; D035261:Plant Components, Aerial / Q000737:chemistry; D011197:Potassium Radioisotopes / Q000032:analysis; D011868:Radioisotopes / Q000032:analysis; D011886:Radon / Q000032:analysis; D012990:Soil Pollutants, Radioactive / Q000032:analysis; D014421:Turkey
chemical_list: D002588:Cesium Radioisotopes; D011197:Potassium Radioisotopes; D011868:Radioisotopes; D012990:Soil Pollutants, Radioactive; D001608:Beryllium; D011886:Radon