title: Half-life determination of the ground state decay of ¹¹¹Ag.
abstract: The radioactive decay half-life of the β(-)-emitter (111)Ag has been measured using decay transitions identified using a high purity germanium γ-ray spectrometer. The time series of measurements of the net peak areas of the 96.8 keV, 245.4 keV and 342.1 keV γ-ray emissions following the β(-) decay of (111)Ag were made over approximately 23 days, i.e. ~3 half-life periods. The measured half-life of the ground state decay of (111)Ag was determined as 7.423 (13) days which is consistent with the Evaluated Nuclear Structure Data File (ENSDF) recommended half-life of 7.45 (1) days at k=2. Utilising all available experimental half-life values, a revised recommended half-life of 7.452 (12) days has been determined.
authors.affiliation: National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK. Electronic address: sean.collins@npl.co.uk.
authors.forename: S M
authors.initials: SM
authors.lastname: Collins
authors.affiliation: National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK.
authors.forename: A V
authors.initials: AV
authors.lastname: Harms
authors.affiliation: National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK; Department of Physics, University of Surrey, Guildford, Surrey GU2 7XH, UK.
authors.forename: P H
authors.initials: PH
authors.lastname: Regan
keywords: (111)Ag; Gamma ray spectrometry; Half-life; Nuclear Data; Radioactivity