First observation of beta-delayed alpha emission from the IAS in 22Mg fixes the 22Al ground state as 4+, ruling out a proton halo due to d-wave barrier.
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A ground state $^{22}$Al halo is unlikely
First observation of beta-delayed alpha emission from the IAS in 22Mg fixes the 22Al ground state as 4+, ruling out a proton halo due to d-wave barrier.