Precision branching ratio measurement for the superallowed β+ emitter Ga62 and isospin-symmetry-breaking corrections in A≥62 nuclei
A high-precision branching ratio measurement for the superallowed β+ decay of Ga62 was performed at the Isotope Separator and Accelerator radioactive ion beam facility. Nineteen γ rays emitted following β+ decay of Ga62 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±1.4s for Ga62 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. © 2006 The American Physical Society.
Publication Source (Journal or Book title)
Physical Review Letters
Hyland, B., Svensson, C., Ball, G., Leslie, J., Achtzehn, T., Albers, D., Andreoiu, C., Bricault, P., Churchman, R., Cross, D., Dombsky, M., Finlay, P., Garrett, P., Geppert, C., Grinyer, G., Hackman, G., Hanemaayer, V., Lassen, J., Lavoie, J., Melconian, D., Morton, A., Pearson, C., Pearson, M., Phillips, A., Schumaker, M., Smith, M., Towner, I., Valiente-Dobón, J., Wendt, K., & Zganjar, E. (2006). Precision branching ratio measurement for the superallowed β+ emitter Ga62 and isospin-symmetry-breaking corrections in A≥62 nuclei. Physical Review Letters, 97 (10) https://doi.org/10.1103/PhysRevLett.97.102501