the detection and the trigger efficiencies. The first $\gamma$ ray comes from the decay of $^{22}Mg$ and corresponds to the total $\beta$-$\gamma$ decay probability of $^{22}Al$.*[]{data-label="tab:intens_bet_gam"}

    -   $\gamma$-particles coincidences\
        Four $\gamma$-rays noted 1, 5, 7 and 8 in figure \[fig:gamma\] were measured at $332 \pm 1.2$ keV, $1112.9 \pm 2.4$ keV, $1385.5 \pm 1.3$ keV and $1633.8 \pm 2.2$ keV. The three first rays are known as $\gamma$ transitions in $^{21}Na$ [@firestone04], which suggest a $\beta$-proton-$\gamma$ decay from $^{22}Al$ to $^{21}Na$. The E4 spectrum conditioned by these 3 $\gamma$ rays shows coincidences. We have observed that the $\gamma$ ray at 332 keV is in coincidence with proton lines 1, 4, 6 and 11 (figure \[fig:pro22al\]). The coincidence spectrum with the $\gamma$ ray at 1112.9 keV is not conclusive. Moreover, the $\gamma$ ray at 1385.5 keV is in coincidence with the proton peak 20.

        The charged-particle peak $17^{**}$ with $E = 4.464 \pm 0.008$ MeV is compatible with the $\beta$-2p decay energy measured by Cable [*et al.*]{} [@cable83] and Blank [*et al.*]{} [@blank] at $E = 4.48 \pm 0.06$ MeV. The $\gamma$-ray spectrum observed in coincidence with this peak is shown in figure \[fig:coinc\_2p\]. It clearly shows a coincidence with a 