Asymmetry in the super-allowed β-transitions of the A=9 isobars
We report here on the recent β-decay studies of the A = 9 isobar made at ISOLDE/CERN. Mirror beta transitions in the A=9 chain are compared and a large asymmetry factor is deduced for the transitions to high excitation energy in 9Be (11.8 MeV) arid 9B (12.2 MeV) fed in the β-decay of 9Li and 9C respectively. It is shown that the asymmetry is not due to experimental problems or differences in the m