Isospin Mixing in the 0^+ arrow 0^+ β^+ decay of ^32Ar
Abstract
Nine precisely determined superallowed 0^+ arrow 0^+ Fermi β decay transitions imply a greater than 2 σ deviation from a unitary CKM matrix. This conclusion depends on calculated isospin-mixing corrections. We have carried out an experiment at the NSCL at MSU to determine with precision the branch for the superallowed decay of ^32Ar. This along with the half-life and mass of ^32Ar will provide a measurement of the isospin mixing correction that has been calculated to be around 2%. This is more than a factor of 3 larger than the corrections for the standard cases, thus providing a good opportunity to check the calculations. A description of the experiment and the status of the analysis will be presented.
- Publication:
-
APS Division of Nuclear Physics Meeting Abstracts
- Pub Date:
- October 1999
- Bibcode:
- 1999APS..DNP..IF05K