Non-statistical decay and $\alpha$-correlations in the ${}^{12}$C+${}^{12}$C fusion-evaporation reaction at 95 MeV

Multiple alpha coincidence and correlations are studied in the reaction ${}^{12}$C+${}^{12}$C at 95 MeV for fusion-evaporation events completely detected in charge. Two specific channels with Carbon and Oxygen residues in coincidence with $\alpha$-particles are addressed, which are associated with anomalously high branching ratios with respect the predictions by Hauser-Feshbach calculations. Triple alpha emission appears kinematically compatible with a sequential emission from a highly excited Mg. The phase space distribution of $\alpha$-$\alpha$ coincidences suggests a correlated emission from a Mg compound, leaving an Oxygen residue excited above the threshold for neutron decay. These observations indicate a preferential $\alpha$ emission of ${}^{24}$Mg at excitation energies well above the threshold for $6-\alpha$ decay.