title: High-precision half-life measurement for the superallowed β+ emitter ²⁶Al(m).
abstract: A high-precision half-life measurement for the superallowed β+ emitter 26Al(m) was performed at the TRIUMF-ISAC radioactive ion beam facility yielding T 1/2 6346.54 ± 0.46(stat) ± 0.60 (syst) ms, consistent with, but 2.5 times more precise than, the previous world average. The 26Al(m) half-life and ft value, 3037.53(61) s, are now the most precisely determined for any superallowed β decay. Combined with recent theoretical corrections for isospin-symmetry-breaking and radiative effects, the corrected Ft value for (26)Al(m), 3073.0(12) s, sets a new benchmark for the high-precision superallowed Fermi β-decay studies used to test the conserved vector current hypothesis and determine the V(ud) element of the Cabibbo-Kobayashi-Maskawa quark mixing matrix.
authors.affiliation: Department of Physics, University of Guelph, Guelph, Ontario, Canada N1G 2W1. pfinlay@uoguelph.ca
authors.forename: P
authors.initials: P
authors.lastname: Finlay
authors.forename: S
authors.initials: S
authors.lastname: Ettenauer
authors.forename: G C
authors.initials: GC
authors.lastname: Ball
authors.forename: J R
authors.initials: JR
authors.lastname: Leslie
authors.forename: C E
authors.initials: CE
authors.lastname: Svensson
authors.forename: C
authors.initials: C
authors.lastname: Andreoiu
authors.forename: R A E
authors.initials: RA
authors.lastname: Austin
authors.forename: D
authors.initials: D
authors.lastname: Bandyopadhyay
authors.forename: D S
authors.initials: DS
authors.lastname: Cross
authors.forename: G
authors.initials: G
authors.lastname: Demand
authors.forename: M
authors.initials: M
authors.lastname: Djongolov
authors.forename: P E
authors.initials: PE
authors.lastname: Garrett
authors.forename: K L
authors.initials: KL
authors.lastname: Green
authors.forename: G F
authors.initials: GF
authors.lastname: Grinyer
authors.forename: G
authors.initials: G
authors.lastname: Hackman
authors.forename: K G
authors.initials: KG
authors.lastname: Leach
authors.forename: C J
authors.initials: CJ
authors.lastname: Pearson
authors.forename: A A
authors.initials: AA
authors.lastname: Phillips
authors.forename: C S
authors.initials: CS
authors.lastname: Sumithrarachchi
authors.forename: S
authors.initials: S
authors.lastname: Triambak
authors.forename: S J
authors.initials: SJ
authors.lastname: Williams
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D001610:Beta Particles; D006207:Half-Life; D011868:Radioisotopes / Q000737:chemistry*
chemical_list: D011868:Radioisotopes; D000535:Aluminum