Half-life of the superallowed {beta}{sup +} emitter {sup 18}Ne
- Department of Physics, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada)
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada)
- Department of Physics, Queen's University, Kingston, Ontario, K7L 3N6 (Canada)
The half-life of {sup 18}Ne has been determined by detecting 1042-keV {gamma} rays in the daughter {sup 18}F following the superallowed-Fermi {beta}{sup +} decay of samples implanted at the center of the 8{pi}{gamma}-ray spectrometer, a spherical array of 20 HPGe detectors. Radioactive {sup 18}Ne 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 {sup 18}Ne, 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 {sup 23}Ne was determined to be 37.11 {+-} 0.06 s, a factor of 2 improvement over the previous precision.
- OSTI ID:
- 21062005
- Journal Information:
- Physical Review. C, Nuclear Physics, Vol. 76, Issue 2; Other Information: DOI: 10.1103/PhysRevC.76.025503; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0556-2813
- Country of Publication:
- United States
- Language:
- English
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