Precise half-life measurement of the superallowed β+ emitter Si26

V. E. Iacob, J. C. Hardy, A. Banu, L. Chen, V. V. Golovko, J. Goodwin, V. Horvat, N. Nica, H. I. Park, L. Trache, and R. E. Tribble
Phys. Rev. C 82, 035502 – Published 16 September 2010

Abstract

We measured the half-life of the superallowed 0+0+ β+ emitter Si26 to be 2245.3(7) ms. We used pure sources of  Si26 and employed a high-efficiency gas counter, which was sensitive to positrons from both this nuclide and its daughter Al26m. 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 Si26.

  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Figure
  • Received 22 February 2010

DOI:https://doi.org/10.1103/PhysRevC.82.035502

©2010 American Physical Society

Authors & Affiliations

V. E. Iacob*, J. C. Hardy, A. Banu, L. Chen, V. V. Golovko, J. Goodwin, V. Horvat, N. Nica, H. I. Park, L. Trache, and R. E. Tribble

  • Cyclotron Institute, Texas A&M University, College Station, Texas 77845-3366, USA

  • *iacob@comp.tamu.edu; On leave from the National Institute for Physics and Nuclear Engineering “Horia Hulubei,” Bucharest, Romania.
  • On leave from the National Institute for Physics and Nuclear Engineering “Horia Hulubei,” Bucharest, Romania.
  • Present address: Department of Physics, Queen’s University, Stirling Hall, Kingston, ON, K7L 3N6, Canada.

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand
Issue

Vol. 82, Iss. 3 — September 2010

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review C

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×