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

Abstract

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.

arXiv comment21 pages, 17 figures, second paper of a series of two

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Cited by in corpus (5)

• Thermal properties of light nuclei from ${}^{12}$C+${}^{12}$C fusion-evaporation reactions
• Examination of cluster production in excited light systems at Fermi energies from new experimental data and comparison with transport model calculations
• Experimental study of precisely selected evaporation chains in the decay of excited ${}^{25}$Mg
• Recent Experimental Results on Nuclear Cluster Physics
• Charged particle decay of hot and rotating ${}^{88}$Mo nuclei in fusion-evaporation reactions