https://doi.org/10.1051/epjconf/20146605012
High-Precision Half-life Measurements for the Superallowed β+ Emitter 14O
1 Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1, Canada
2 Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
3 Department of Astronomy & Physics, Saint Mary’s University, Halifax, Nova Scotia B3H 3C3, Canada
4 TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
5 Centre d’Etudes Nucléaires de Bordeaux Gradignan-Université Bordeaux 1-UMR 5797 CNRS/IN2P3, Chemin du Solarium, BP 120, F-33175 Gradignan Cedex, France
6 GANIL, CEA/DSM-CNRS/IN2P3, Bvd Henri Becquerel, 14076 Caen, France
7 Department of Physics, Queen’s University, Kingston, Ontario K7L 3N6, Canada
a e-mail: alaffole@uoguelph.ca
Published online: 20 March 2014
The half-life of 14O, a superallowed Fermi β+ emitter, has been determined via simultaneous γ and β counting experiments at TRIUMF’s Isotope Separator and Accelerator facility. Following the implantation of 14O samples at the center of the 8π spectrometer, a γ counting measurement was performed by detecting the 2313 keV γ-rays emitted from the first excited state of the daughter 14N using 20 high-purity germanium (HPGe) detectors. A simultaneous β counting experiment was performed using a fast plastic scintillator positioned directly behind the implantation site. The results, T½(γ) = 70:632 ± 0:094 s and T½(β) = 70:610 ± 0:030 s, are consistent with one another and, together with eight previous measurements, establish a new average for the 14O half-life of T½ = 70:619 ± 0:011 s with a reduced χ2 of 0.99.
© Owned by the authors, published by EDP Sciences, 2014
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 2.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
