Precision Branching Ratio Measurement for the Superallowed {beta}{sup +} Emitter {sup 62}Ga and Isospin-Symmetry-Breaking Corrections in A{>=}62 Nuclei

Journal Article · Fri Sep 08 00:00:00 EDT 2006 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.97.102501· OSTI ID:20860783

Hyland, B; Svensson, C E; Andreoiu, C; Finlay, P; Grinyer, G F; Phillips, A A; Schumaker, M A; Valiente-Dobon, J J ^[1]; Ball, G C; Achtzehn, T; Albers, D; Bricault, P; Churchman, R; Dombsky, M; Hackman, G; Hanemaayer, V; Lassen, J; Morton, A C; Pearson, C J; Pearson, M R ^[2]

---

1. Department of Physics, University of Guelph, Guelph, Ontario N1G 2W1 (Canada)
2. 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, Vol. 97, Issue 10; Other Information: DOI: 10.1103/PhysRevLett.97.102501; (c) 2006 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCURACY
BETA-PLUS DECAY
BRANCHING RATIO
CORRECTIONS
FT VALUE
GALLIUM 62
GAMMA RADIATION
HALF-LIFE
ISOSPIN
ISOTOPE SEPARATORS
MASS
Q-VALUE
RADIOACTIVE ION BEAMS
SYMMETRY BREAKING