The half-life of Ne18 has been determined by detecting 1042-keV γ rays in the daughter F18 following the superallowed-Fermi β+ decay of samples implanted at the center of the 8πγ-ray spectrometer, a spherical array of 20 HPGe detectors. Radioactive Ne18 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 β decay to utilize both a large-scale HPGe spectrometer and the isotope separation on-line technique. The half-life of Ne18, 1.6656 ± 0.0019 s, deduced following a 1.4σ 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 Ne23 was determined to be 37.11 ± 0.06 s, a factor of 2 improvement over the previous precision. © 2007 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review C - Nuclear Physics
Grinyer, G., Smith, M., Andreoiu, C., Andreyev, A., Ball, G., Bricault, P., Chakrawarthy, R., Daoud, J., Finlay, P., Garrett, P., Hackman, G., Hyland, B., Leslie, J., Morton, A., Pearson, C., Phillips, A., Schumaker, M., Svensson, C., Valiente-Dobón, J., Williams, S., & Zganjar, E. (2007). Half-life of the superallowed β+ emitter Ne18. Physical Review C - Nuclear Physics, 76 (2) https://doi.org/10.1103/PhysRevC.76.025503