Key points are not available for this paper at this time.
Beta-delayed proton and gamma emission in the decay of ^21Mg has been measured at ISOLDE, CERN with the ISOLDE Decay Station (IDS) set-up. The existing decay scheme is updated, in particular what concerns proton transitions to excited states in ^20Ne. Signatures of interference in several parts of the spectrum are used to settle spin and parity assignments to highly excited states in ^21Na. The previously reported p branch is confirmed. A half-life of 120. 5 (4) ms is extracted for ^21Mg. The revised decay scheme is employed to test mirror symmetry in the decay and to extract the beta strength distribution of ^21Mg that is compared with theory.
Jensen et al. (Thu,) studied this question.