Phys.Rev. C 96, 025501 (2017)

P.Finlay, A.T.Laffoley, G.C.Ball, P.C.Bender, M.R.Dunlop, R.Dunlop, G.Hackman, J.R.Leslie, A.D.MacLean, D.Miller, M.Moukaddam, B.Olaizola, N.Severijns, J.K.Smith, D.Southall, C.E.Svensson

High-precision half-life determination for ²¹Na using a 4π gas-proportional counter

RADIOACTIVITY ²¹Na(β⁺)[from Ta(p, X), E=480 MeV at TRIUMF cyclotron]; measured Eγ, βγ-coin, β⁺ particles, precise half-life of ²¹Na decay using 4π continuous-flow gas proportional counter at TRIUMF-ISAC facility. detailed analysis of half-life data and systematic uncertainties. ²¹Na; deduced world-average half-life by combining present result with previous measurements, and discussed contribution to the uncertainty in the Ft value of the superallowed β⁺ transition between the isospin T=1/2 mirror nuclei ²¹Na and ²¹Ne.

doi: 10.1103/PhysRevC.96.025501