Precise half-life measurement of the superallowed {beta}{sup +} emitter {sup 26}Si

Journal Article · Wed Sep 15 00:00:00 EDT 2010 · Physical Review. C, Nuclear Physics

DOI:https://doi.org/10.1103/PHYSREVC.82.035502· OSTI ID:21419563

Iacob, V E; Hardy, J C; Banu, A; Chen, L; Golovko, V V; Goodwin, J; Horvat, V; Nica, N; Park, H I; Trache, L; Tribble, R E ^[1]

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1. Cyclotron Institute, Texas A and M University, College Station, Texas 77845-3366 (United States)

We measured the half-life of the superallowed 0{sup +{yields}}0{sup +} {beta}{sup +} emitter {sup 26}Si to be 2245.3(7) ms. We used pure sources of {sup 26}Si and employed a high-efficiency gas counter, which was sensitive to positrons from both this nuclide and its daughter {sup 26}Al{sup m}. The data were analyzed as a linked parent-daughter decay. To contribute meaningfully to any test of the unitarity of the Cabibbo-Kobayashi-Maskawa (CKM) matrix, the ft value of a superallowed transition must be determined to a precision of 0.1% or better. With a precision of 0.03%, the present result is more than sufficient to be compatible with that requirement. Only the branching ratio now remains to be measured precisely before a {+-}0.1% ft value can be obtained for the superallowed transition from {sup 26}Si.

• OSTI ID: 21419563
• Journal Information: Physical Review. C, Nuclear Physics, Vol. 82, Issue 3; Other Information: DOI: 10.1103/PhysRevC.82.035502; (c) 2010 The American Physical Society; ISSN 0556-2813
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
ALUMINIUM 26
BRANCHING RATIO
EFFICIENCY
FT VALUE
HALF-LIFE
KOBAYASHI-MASKAWA MATRIX
NUCLEAR DECAY
POSITRONS
SILICON 26
UNITARITY
ALUMINIUM ISOTOPES
ANTILEPTONS
ANTIMATTER
ANTIPARTICLES
BETA DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
DECAY
DIMENSIONLESS NUMBERS
ELEMENTARY PARTICLES
EVEN-EVEN NUCLEI
FERMIONS
ISOTOPES
LEPTONS
LIGHT NUCLEI
MATRICES
MATTER
NUCLEI
ODD-ODD NUCLEI
RADIOISOTOPES
SECONDS LIVING RADIOISOTOPES
SILICON ISOTOPES
YEARS LIVING RADIOISOTOPES