Clustering effects on the $^{6}Li+^{6}Li \rightarrow 3\alpha$ reaction and possible astrophysical implications.

Spitaleri .C, Messina S., Cvetinović A., Soić N., Colović P., Dell'Aquila D., Guardo A.G.L., Gulino M., La Cognata M., Lamia L., Lattuada D., M. Lattuada M., Milin M., Nurkić D., Popoconski R., Sergi M.L., Spartá R., Romano S., Skukan N., Szilner S., Trippella O., Tumino A., Uroić M., Vukman N.

I - Fisica nucleare e subnucleare
Aula 32C-3 - Venerdì 21 h 15:30 - 18:30
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The $\sigma(E_{cm})$ of the ${}^{6}Li+{}^{6}Li\rightarrow \alpha +{}^{8}Be_{gs}$ reaction channel has been measured in kinematically complete experiments around the Coulomb barrier. To investigate the presence of clustering effects in the excitation function below the Coulomb barrier, energy data from the experiment are compared with a theoretical trend of transmission Coulomb barrier point-like ${}^{6}Li - {}^{6}Li$. The theoretical trend of the transmission Coulomb barrier point-like seems to show a deviation from the $\sigma (E_{cm}exp)$. Since this effect could be due to the different barrier inside ${}^{6}Li$ (d-($\alpha$-clusters), in particular (${}^{6}Li)$-(d-$\alpha$), ($\alpha$-d)-(d-$\alpha$), a comparison should be performed with penetrability tied to the different Coulomb barriers.

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