Abstract
Observation of -delayed protons from the decay of the mass-separated nuclide ( ms) establishes the mass excess of the lowest state in (13.42 ± 0.05 MeV), thereby completing the mass-20 isospin quintet. All members of this multiplet are bound to isospin-allowed particle-decay modes, providing the first test of the isobaric multiplet mass equation for such a quintet. Excellent agreement is observed using only the quadratic form of this equation.
- Received 31 October 1978
DOI:https://doi.org/10.1103/PhysRevLett.42.43
©1979 American Physical Society