title: Distribution characteristics of ¹³⁷Cs, Pu isotopes and ²⁴¹Am in soil in Korea.
abstract: Cesium-137, Plutonium isotopes and (241)Am were studied in soil samples collected from Korea between 2006 and 2008 to provide information on the distribution and origin of Pu isotopes and (241)Am. The vertical profiles of radionuclides showed higher activity concentrations at the surface layer and then gradually decreased with depth. A good correlation between (137)Cs and (239,240)Pu was observed, whereas a poor relationship between (137)Cs and (241)Am was found. The (238)Pu/(239,240)Pu, (241)Am/(239,240)Pu and (239,240)Pu/(137)Cs activity ratios were concordant to those of the global fallout ratios. Furthermore, the atomic ratios of (240)Pu/(239)Pu in the samples provided the information of Pu depositional history and the origin of Pu isotopes in Korea.
authors.affiliation: Korea Research Institute of Standards and Science (KRISS), Daejeon 305-600, Republic of Korea. s.lee@kriss.re.kr
authors.forename: S H
authors.initials: SH
authors.lastname: Lee
authors.forename: J S
authors.initials: JS
authors.lastname: Oh
authors.forename: J M
authors.initials: JM
authors.lastname: Lee
authors.forename: K B
authors.initials: KB
authors.lastname: Lee
authors.forename: T S
authors.initials: TS
authors.lastname: Park
authors.forename: G
authors.initials: G
authors.lastname: Lujaniene
authors.forename: D
authors.initials: D
authors.lastname: Valiulis
authors.forename: J
authors.initials: J
authors.lastname: Sakalys
mesh_terms: D000576:Americium / Q000032:analysis*; D002588:Cesium Radioisotopes / Q000032:analysis*; D011005:Plutonium / Q000032:analysis*; D011829:Radiation Dosage; D011834:Radiation Monitoring / Q000706:statistics & numerical data*; D011847:Radioactive Fallout / Q000032:analysis / Q000706:statistics & numerical data*; D056910:Republic of Korea; D016008:Statistical Distributions
chemical_list: D002588:Cesium Radioisotopes; D011847:Radioactive Fallout; D011005:Plutonium; D000576:Americium
keywords: (137)Cs; (241)Am; Korea; Pu isotopes; Soil