The half-life of Ne-18 has been determined by detecting 1042-keV gamma rays in the daughter F-18 following the superallowed-Fermi beta(+) decay of samples implanted at the center of the 8 pi gamma-ray spectrometer, a spherical array of 20 HPGe detectors. Radioactive Ne-18 beams were produced on-line, mass-separated, and ionized using an electron-cyclotron-resonance ionization source at the ISAC facility at TRIUMF in Vancouver, Canada. This is the first high-precision half-life measurement of a superallowed Fermi beta decay to utilize both a large-scale HPGe spectrometer and the isotope separation on-line technique. The half-life of Ne-18, 1.6656 +/- 0.0019 s, deduced following a 1.4 sigma correction for detector pulse pile-up, is four times more precise than the previous world average. As part of an investigation into potential systematic effects, the half-life of the heavier isotope Ne-23 was determined to be 37.11 +/- 0.06 s, a factor of 2 improvement over the previous precision.
|Article number||ARTN 025503|
|Number of pages||6|
|Journal||Physical Review C|
|Publication status||Published - Aug 2007|
- ISOSPIN-MIXING CORRECTIONS