title: 18F half-life measurement using a high-purity germanium detector.
abstract: The half-life of (18)F has been measured using HPGe detectors with a (137)Cs reference source. The counting ratio of 511 keV γ-rays from (18)F to 622 keV γ-rays from (137)Cs was fitted for the half-life with a weighted least-square method. Uncertainties due to the systematic effects arising from the measurement of a high activity (18)F source were studied in detail. The half-life of (18)F was found to be (109.72±0.19) min. The result is in a good agreement with the recommended value of (109.728±0.019) min evaluated at the Laborotaire National Henri Becquerel (LNHB).
authors.affiliation: Korea Research Institute of Standards and Science, Daejeon 305-600, Republic of Korea.
authors.forename: Jubong
authors.initials: J
authors.lastname: Han
authors.forename: K B
authors.initials: KB
authors.lastname: Lee
authors.forename: T S
authors.initials: TS
authors.lastname: Park
authors.forename: J M
authors.initials: JM
authors.lastname: Lee
authors.forename: P J
authors.initials: PJ
authors.lastname: Oh
authors.forename: S H
authors.initials: SH
authors.lastname: Lee
authors.forename: Y S
authors.initials: YS
authors.lastname: Kang
authors.forename: J K
authors.initials: JK
authors.lastname: Ahn
mesh_terms: D002588:Cesium Radioisotopes; D005462:Fluorine Radioisotopes / Q000737:chemistry*; D019788:Fluorodeoxyglucose F18; D005720:Gamma Rays; D006207:Half-Life; D011851:Radioactivity; D012015:Reference Standards; D035501:Uncertainty
chemical_list: D002588:Cesium Radioisotopes; D005462:Fluorine Radioisotopes; D019788:Fluorodeoxyglucose F18