The analysis of exclusive events completely reconstructed in charge for the two reactions 12C+12C and 14N+10B at 95 and 80 MeV incident energy respectively, is presented. The comparison of light charged particles energy spectra with dedicated Hauser-Feshbach calculations suggests that the dominant reaction mechanism is compound nucleus (CN) formation and decay. However, in both reactions, a discrepancy with statistical expectations is found for α particles detected in coincidence with a Carbon and an Oxigen residue. The comparison between the two reactions shows that this discrepancy is only partly explained by an entrance channel effect. The ratio of experimental to predicted branching ratios for different channels involving α emission finally suggests the persistency of cluster correlations in the hot fused 24Mg source, at excitation energy well above the 6-α decay threshold.
α-clustering effects in 12C +12C and 14N +10B fusion reactions at 2.6 A. MeV excitation energy / Morelli L., Baiocco G., D'Agostino M., Gulminelli F., Cinausero M., Degerlier M., Fabris D., Gramegna F., Marchi T., Barlin S., Bini M., Casini G., Gelli N., Olmi A., Pasquali G., Piantelli S., Valdre S.. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - ELETTRONICO. - (2013), pp. 0-0. (10th Latin American Symposium on Nuclear Physics and Applications, LASNPA 2013 ury 2013).
α-clustering effects in 12C +12C and 14N +10B fusion reactions at 2.6 A. MeV excitation energy
Pasquali G.;Piantelli S.;
2013
Abstract
The analysis of exclusive events completely reconstructed in charge for the two reactions 12C+12C and 14N+10B at 95 and 80 MeV incident energy respectively, is presented. The comparison of light charged particles energy spectra with dedicated Hauser-Feshbach calculations suggests that the dominant reaction mechanism is compound nucleus (CN) formation and decay. However, in both reactions, a discrepancy with statistical expectations is found for α particles detected in coincidence with a Carbon and an Oxigen residue. The comparison between the two reactions shows that this discrepancy is only partly explained by an entrance channel effect. The ratio of experimental to predicted branching ratios for different channels involving α emission finally suggests the persistency of cluster correlations in the hot fused 24Mg source, at excitation energy well above the 6-α decay threshold.
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
