Phys.Rev. C 100, 065805 (2019)

O.S.Kirsebom, for the A2 Collaboration at MAMI

Measurement of the 2⁺ → 0⁺ ground-state transition in the β decay of ²⁰F

RADIOACTIVITY ²⁰F(β^-)[from ¹⁹F(d, p), E=6 MeV at the IGISOL facility in Jyvaskyla]; measured Eβ, Iβ, branching ratio of the 2+ to 0+ β transition to the ground state of ²⁰Ne; deduced logft value for the second-forbidden, nonunique β transition. Comparison with shell-model calculations. Discussed implications for the final evolution of stars which develop degenerate oxygen-neon cores.

doi: 10.1103/PhysRevC.100.065805