emitted, a $\gamma$-ray measurement and $\gamma$-particle coincidences to give a more certain assignment for many transitions.

A comparison of the experimental results with detailed shell model calculations is also proposed in the present paper. For the first time, a complete set of calculations for all particle decay channels from relevant levels in $^{22}Mg$ is done. This will allow us to investigate the Gamow-Teller quenching in $\beta$-decay, to test the isobaric multiplet mass equation (IMME), and to probe the isospin symmetry in $\beta$-transitions of mirror decays. Another challenge is to determine the spin of the $^{22}Al$ ground state.

The experimental setup {#sec:2}
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The study of the $^{22}Al$ $\beta$ decay was performed at GANIL with the LISE3 zero-degree achromatic recoil spectrometer [@lise; @lise3]. It was part of a systematic $\beta$-decay study of neutron deficient nuclei: $^{27}S$ [@canchel], $^{25}Si$ and $^{26}P$ [@thomas] where the same experimental setup was used. The nucleus $^{22}Al$ was produced by the fragmentation of a 95 A MeV $^{36}Ar$ primary beam on a 528 mg/cm$^2$ carbon target located in the SISSI device. The $^{22}Al$ secondary beam had an energy of 48 A MeV. Using a beryllium degrader at the intermediate LISE focal plane and the LISE3 Wien filter, 