title: High-precision measurement of the half-life of 147Sm.
abstract: The half-life of the long-lived isotope (147)Sm was determined by means of activity determination using liquid scintillation counting. The amount of samarium was determined by ICP-OES using a NIST reference standard. The isotopic ratio N((147)Sm)/N(Sm) of the samples was measured by means of ICP-HRMS. The half-life was found to be 1.070(9)x10(11) y. The result is in good agreement with other evaluations and the relative standard uncertainty of 0.8% is lower than in any previous work.
authors.affiliation: Physikalisch-Technische Bundesanstalt, Bundesallee 100, D-38116 Braunschweig, Germany. karsten.kossert@ptb.de
authors.forename: Karsten
authors.initials: K
authors.lastname: Kossert
authors.forename: Gerhard
authors.initials: G
authors.lastname: Jörg
authors.forename: Ole
authors.initials: O
authors.lastname: Nähle
authors.forename: Christoph Lierse
authors.initials: CL
authors.lastname: v Gostomski