High-Precision Half-life Measurements for the Superallowed $\beta$+ Emitter $^{14}$O

A.T. Laffoley (1) , C.E. Svensson , C. Andreoiu , R.A.E. Austin (2) , G.C. Ball (3) , Bertram Blank (4) , H. Bouzomita (5) , D. S. Cross , A. Diaz Varela , R. Dunlop , P. Finlay (6) , A.B. Garnsworthy , P. Garrett , J. Giovinazzo (4) , G.F. Grinyer (5) , G. Hackman , B. Hadinia , D.S. Jamieson , S. Ketelhut , K.G. Leach (1) , J.R. Leslie , E.R. Tardiff , J.C. Thomas (5) , C. Unsworth

1 Department of Physics [Guelph]
2 Department of Astronomy and Physics [Halifax]
3 TRIUMF [Vancouver]
4 NEX - Noyaux exotiques
5 GANIL - Grand Accélérateur National d'Ions Lourds
6 IKS - Instituut voor Kern-en Stralingsfysica

The half-life of 14O, a superallowed Fermi emitter, has been determined via simultaneous and counting experiments at TRIUMF's Isotope Separator and Accelerator facility. Following the implantation of 14O samples at the center of the 8 spectrometer, a counting measurement was performed by detecting the 2313 keV rays emitted from the first excited state of the daughter 14N using 20 high-purity germanium (HPGe) detectors. A simultaneous counting experiment was performed using a fast plastic scintillator positioned directly behind the implantation site. The results, T1=2( ) = 70:632 0:094 s and T1=2( ) = 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 T1=2 = 70:619 0:011 s with a reduced 2 of 0.99.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]

A.T. Laffoley, C.E. Svensson, C. Andreoiu, R.A.E. Austin, G.C. Ball, et al.. High-Precision Half-life Measurements for the Superallowed $\beta$+ Emitter $^{14}$O. 25th International Nuclear Physics Conference (INPC 2013), Jun 2013, Firenze, Italy. 66, pp.05012, 2013, ⟨10.1051/epjconf/20146605012⟩. ⟨in2p3-00939050⟩