title: The use of tree bark as long term biomonitor of (137)Cs deposition.
abstract: Airborne (137)Cs originated from the nuclear tests in the atmosphere and from the Chernobyl nuclear disaster was retained by the trees biomass and nowadays it can still be found in various concentrations in tree barks from Romania and other European countries. This study brings the first results of (137)Cs presence in tree bark from Romania on different considerations: (i) data dispersion in spruce and oak bark from NW, SW and central Romania, and the spatial variability of (137)Cs within oak and spruce bark from a natural protected forest area from Balvanyos area (Covasna County), known to be highly affected by the Chernobyl nuclear release; (ii) comparison of (137)Cs content in different tree bark species (oak, spruce, poplar and cherry); (iii) differences in (137)Cs concentrations with the bark depth layers and around the tree trunk; and (iv) comparison of mean (137)Cs values in spruce/oak bark from Romania with data from other European countries.
authors.affiliation: Environmental Radioactivity and Nuclear Dating Center, Babeş-Bolyai University, Treboniu Laurian 42, Cluj-Napoca, Romania.
authors.forename: Constantin
authors.initials: C
authors.lastname: Cosma
authors.affiliation: Environmental Radioactivity and Nuclear Dating Center, Babeş-Bolyai University, Treboniu Laurian 42, Cluj-Napoca, Romania. Electronic address: iurian.andra@ubbcluj.ro.
authors.forename: Andra-Rada
authors.initials: AR
authors.lastname: Iurian
authors.affiliation: Environmental Radioactivity and Nuclear Dating Center, Babeş-Bolyai University, Treboniu Laurian 42, Cluj-Napoca, Romania.
authors.forename: Reka
authors.initials: R
authors.lastname: Incze
authors.affiliation: Institute of Radiochemistry and Radioecology, University of Pannonia, H-8201 Veszprem, Hungary.
authors.forename: Tibor
authors.initials: T
authors.lastname: Kovacs
authors.affiliation: Vinca Institute of Nuclear Sciences, University of Belgrade, Belgrade, Serbia.
authors.forename: Zora S
authors.initials: ZS
authors.lastname: Žunić
mesh_terms: D000396:Air Pollutants, Radioactive / Q000032:analysis*; D002588:Cesium Radioisotopes / Q000032:analysis*; D047852:Chernobyl Nuclear Accident; D028222:Picea / Q000737:chemistry; D024301:Plant Bark / Q000737:chemistry*; D029963:Quercus / Q000737:chemistry; D011834:Radiation Monitoring / Q000379:methods*; D012383:Romania; D014197:Trees / Q000737:chemistry*
chemical_list: D000396:Air Pollutants, Radioactive; D002588:Cesium Radioisotopes
keywords: (137)Cs; Bark contamination; Oak bark; Radionuclide accumulation; Romania