Collins S M, Harms A V, Regan P H
National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK.
National Physical Laboratory, Hampton Road, Teddington, Middlesex TW11 0LW, UK.
Appl Radiat Isot. 2016 Feb;108:143-147. doi: 10.1016/j.apradiso.2015.12.044. Epub 2015 Dec 18.
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.
