Published in
IOP Publishing, Journal of Physics G: Nuclear and Particle Physics, 7(41), p. 075108
DOI: 10.1088/0954-3899/41/7/075108
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Non-statistical decay and α-correlations in the<sup>12</sup>C+<sup>12</sup>C fusion–evaporation reaction at 95 MeV
,
M. Bruno,
U. Abbondanno,
S. Appannababu,
S. Barlini,
M. Bini,
G. Casini,
M. Cinausero,
M. Degerlier,
D. Fabris,
N. Gelli,
F. Gramegna
and other authors.
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Abstract
21 pages, 17 figures, second paper of a series of two ; International audience ; 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 $α$-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 $α$-$α$ 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 $α$ emission of $^{24}$Mg at excitation energies well above the threshold for $6-α$ decay.