Precision branching ratio measurement for the superallowed beta+ emitter 62Ga and isospin-symmetry-breaking corrections in A>or=62 nuclei.
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A high-precision branching ratio measurement for the superallowed beta+ decay of 62Ga was performed at the Isotope Separator and Accelerator radioactive ion beam facility. Nineteen gamma rays emitted following beta+ decay of 62Ga 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 62Ga decay. These results demonstrate the feasibility of high-precision superallowed branching ratio measurements in the A>or=62 mass region and provide the first stringent tests of the large isospin-symmetry-breaking effects predicted for these decays.
author list (cited authors)
Hyland, B., Svensson, C. E., Ball, G. C., Leslie, J. R., Achtzehn, T., Albers, D., ... Zganjar, E. F.
complete list of authors
Hyland, B||Svensson, CE||Ball, GC||Leslie, JR||Achtzehn, T||Albers, D||Andreoiu, C||Bricault, P||Churchman, R||Cross, D||Dombsky, M||Finlay, P||Garrett, PE||Geppert, C||Grinyer, GF||Hackman, G||Hanemaayer, V||Lassen, J||Lavoie, JP||Melconian, D||Morton, AC||Pearson, CJ||Pearson, MR||Phillips, AA||Schumaker, MA||Smith, MB||Towner, IS||Valiente-Dobón, JJ||Wendt, K||Zganjar, EF