β-decay in the A = 9 isobar

The study of beta decay to final states with high multiplicity has recently become more feasible with the advent of highly segmented particle detectors adjusted to low energy nuclear physics experiments [1]. This development has made possible to study exotic nuclear decay modes and especially to follow the break-up of unbound light nuclei fed in the decay. The high detector granularity allows for detecting all particles in the break-up, determining energy as well as emission angle and therefore the possibility to fully reconstruct the excitation energy of the decaying states.