$\mathcal{F}t$ values measured to $\pm0.1\%$ for superallowed beta transitions: Metrology at sub-second time scales
| Pub type: | Inproceedings |
| Citation: | hardy:ICRM2013-Ft |
| Status: | Published |
| Journal: | Applied Radiation and Isotopes |
| Booktitle: | Proceedings of the 19th International Conference on Radionuclide Metrology and its Applications |
| Volume: | 87 |
| Year: | 2014 |
| Month: | May |
| Pages: | 297 - 301 |
| Location: | Antwerp, Belgium |
| Note: | 17–21 June 2013 |
| ISSN: | 0969-8043 |
| URL: | http://www.sciencedirect.com/s... |
| DOI: | 10.1016/j.apradiso.2013.11.018 |
| Abstract: | Because of angular-momentum conservation, superallowed β decay between 0+ analog states involves only the vector part of the weak interaction, so its measured ft value can be used to determine the vector coupling constant, GV. If many such transitions are measured, then the constancy of \{GV\} can be established and several important tests made on fundamentals of the electroweak Standard Model. We have developed apparatus that allows us to measure half-lives to ±0.03% and branching ratios to ±0.1% or better, for cyclotron-produced activities with half-lives as short as 100 ms. We present an overview of the equipment and a summary of more than 10 years of results. |
| Month_val: | 5 |
| Sig contrib: | J. C. Hardy, V. E. Iacob |
| Keywords: | Beta decay, Branching ratios, Half-lives |
| Authors: | |
| Added by: | [DGM] |
| Total mark: | 0 |
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