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Journal article
High precision measurement of the superallowed 0+ --> 0+ beta decay of 22Mg
Physical review letters, v 91(8), pp 082501-082501
22 Aug 2003
PMID: 14525235
Abstract
The half-life, 3.8755(12) s, and superallowed branching ratio, 0.5315(12), for 22Mg beta decay have been measured with high precision. The latter depended on gamma-ray intensities being measured with an HPGe detector calibrated for relative efficiencies to an unprecedented 0.15%. Previous precise measurements of 0+ --> 0+ transitions have been restricted to the nine that populate stable daughter nuclei. No more such cases exist, and any improvement in a critical Cabibbo-Kobayashi-Maskawa unitarity test must depend on precise measurements of more exotic nuclei. With this branching-ratio measurement, we show those to be possible for T(z)=-1 parents. We obtain a corrected Ft value of 3071(9) s, in good agreement with expectations.
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Details
- Title
- High precision measurement of the superallowed 0+ --> 0+ beta decay of 22Mg
- Creators
- J C HardyV E IacobM Sanchez-VegaR G NeilsonA AzhariC A GagliardiV E MayesX TangL TracheR E Tribble
- Publication Details
- Physical review letters, v 91(8), pp 082501-082501
- Publisher
- Cold Spring Harbor Press
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Physics
- Web of Science ID
- WOS:000184898800013
- Scopus ID
- 2-s2.0-85038324023
- Other Identifier
- 991021863145304721
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- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Physics, Multidisciplinary