High-Precision Half-Life Measurement for the Superallowed {beta}{sup +} Emitter {sup 26}Al{sup m}

Journal Article · Fri Jan 21 00:00:00 EST 2011 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.106.032501· OSTI ID:21532253

Finlay, P; Svensson, C E; Green, K L; Leach, K G; Phillips, A A; Sumithrarachchi, C S ^[1]; Ettenauer, S ^[2]; Ball, G C; Bandyopadhyay, D; Djongolov, M; Hackman, G; Pearson, C J; Williams, S J ^[2]; Leslie, J R ^[3]; Andreoiu, C; Cross, D S ^[4]; Austin, R A. E. ^[5]; Demand, G ^[1]; Garrett, P E; Triambak, S ^[1]

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1. Department of Physics, University of Guelph, Guelph, Ontario, N1G 2W1 (Canada)
2. TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada)
3. Department of Physics, Queen's University, Kingston, Ontario, K7L 3N6 (Canada)
4. Department of Chemistry, Simon Fraser University, Burnaby, British Columbia, V5A 1S6 (Canada)
5. Astronomy and Physics Department, Saint Mary's University, Halifax, Nova Scotia, B3H 3C3 (Canada)

A high-precision half-life measurement for the superallowed {beta}{sup +} emitter {sup 26}Al{sup m} was performed at the TRIUMF-ISAC radioactive ion beam facility yielding T{sub 1/2}=6346.54{+-}0.46{sub stat{+-}}0.60{sub syst} ms, consistent with, but 2.5 times more precise than, the previous world average. The {sup 26}Al{sup m} half-life and ft value, 3037.53(61) s, are now the most precisely determined for any superallowed {beta} decay. Combined with recent theoretical corrections for isospin-symmetry-breaking and radiative effects, the corrected Ft value for {sup 26}Al{sup m}, 3073.0(12) s, sets a new benchmark for the high-precision superallowed Fermi {beta}-decay studies used to test the conserved vector current hypothesis and determine the V{sub ud} element of the Cabibbo-Kobayashi-Maskawa quark mixing matrix.

• OSTI ID: 21532253
• Journal Information: Physical Review Letters, Vol. 106, Issue 3; Other Information: DOI: 10.1103/PhysRevLett.106.032501; (c) 2011 American Institute of Physics; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ALUMINIUM 26
BENCHMARKS
BETA DECAY
CORRECTIONS
FT VALUE
HALF-LIFE
HYPOTHESIS
ISOSPIN
MATRICES
QUARKS
RADIOACTIVE ION BEAMS
SYMMETRY BREAKING
VECTOR CURRENTS
ALGEBRAIC CURRENTS
ALUMINIUM ISOTOPES
BEAMS
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
CURRENTS
DECAY
FERMIONS
ION BEAMS
ISOTOPES
LIGHT NUCLEI
NUCLEAR DECAY
NUCLEI
ODD-ODD NUCLEI
PARTICLE PROPERTIES
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
YEARS LIVING RADIOISOTOPES