Precision Branching Ratio Measurement for the Superallowed {beta}{sup +} Emitter {sup 62}Ga and Isospin-Symmetry-Breaking Corrections in A{>=}62 Nuclei
- Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1 (Canada)
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3 (Canada)
A high-precision branching ratio measurement for the superallowed {beta}{sup +} decay of {sup 62}Ga was performed at the Isotope Separator and Accelerator radioactive ion beam facility. Nineteen {gamma} rays emitted following {beta}{sup +} decay of {sup 62}Ga were identified, establishing the dominant superallowed branching ratio to be (99.861{+-}0.011)%. Combined with recent half-life and Q-value measurements, this branching ratio yields a superallowed ft value of 3075.6{+-}1.4 s for {sup 62}Ga decay. These results demonstrate the feasibility of high-precision superallowed branching ratio measurements in the A{>=}62 mass region and provide the first stringent tests of the large isospin-symmetry-breaking effects predicted for these decays.
- OSTI ID:
- 20860783
- Journal Information:
- Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 97; ISSN 0031-9007; ISSN PRLTAO
- Country of Publication:
- United States
- Language:
- English
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