title: Carbon, cesium and iodine isotopes in Japanese cedar leaves from Iwaki, Fukushima.
abstract: Japanese cedar leaves from Iwaki, Fukushima were analyzed for carbon, cesium and iodine isotopic compositions before and after the 2011 nuclear accident. The Δ14C values reflect ambient atmospheric14C concentrations during the year the leaves were sampled/defoliated, and also previous year(s). The elevated129I and134,137Cs concentrations are attributed to direct exposure to the radioactive fallout for the pre-fallout-expended leaves and to internal translocation from older parts of the tree for post-fallout-expended leaves.134Cs/137Cs and129I/137Cs activity ratios suggest insignificant isotopic and elemental fractionation during translocation. However, fractionation between radioiodine and radiocesium is significant during transportation from the source.
authors.affiliation: Scottish Universities Environmental Research Centre, East Kilbride, G75 0QF UK ; Fukushima University, Fukushima, 960-1296 Japan.
authors.forename: Sheng
authors.initials: S
authors.lastname: Xu
authors.affiliation: Scottish Universities Environmental Research Centre, East Kilbride, G75 0QF UK.
authors.forename: Gordon T
authors.initials: GT
authors.lastname: Cook
authors.affiliation: Scottish Universities Environmental Research Centre, East Kilbride, G75 0QF UK ; Fukushima University, Fukushima, 960-1296 Japan.
authors.forename: Alan J
authors.initials: AJ
authors.lastname: Cresswell
authors.affiliation: Scottish Universities Environmental Research Centre, East Kilbride, G75 0QF UK.
authors.forename: Elaine
authors.initials: E
authors.lastname: Dunbar
authors.affiliation: Scottish Universities Environmental Research Centre, East Kilbride, G75 0QF UK.
authors.forename: Stewart P H T
authors.initials: SP
authors.lastname: Freeman
authors.affiliation: Center for Nuclear Technologies, Technical University of Denmark, 4000 Roskilde, Denmark.
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Hou
authors.affiliation: Scottish Universities Environmental Research Centre, East Kilbride, G75 0QF UK.
authors.forename: Helen
authors.initials: H
authors.lastname: Kinch
authors.affiliation: Scottish Universities Environmental Research Centre, East Kilbride, G75 0QF UK.
authors.forename: Philip
authors.initials: P
authors.lastname: Naysmith
authors.affiliation: Scottish Universities Environmental Research Centre, East Kilbride, G75 0QF UK.
authors.forename: David W C
authors.initials: DW
authors.lastname: Sanderson
authors.affiliation: Center for Nuclear Technologies, Technical University of Denmark, 4000 Roskilde, Denmark ; Xi'an AMS Center, SKLLQG, Institute of Earth Environment, CAS, Xi'an, 710061 China.
authors.forename: Luyuan
authors.initials: L
authors.lastname: Zhang
keywords: 129I; 134,137Cs; 14C; Fukushima nuclear accident; Japanese cedar leaf