Comunicazione
The low-energy fusion in the system $^{12}C + {}^{26}Mg$.
Cobo Zarzuelo A., Del Fabbro M., Montagnoli G., Stefanini A., Stramaccioni D., Brugnara D., Colucci G., Cintora de la Cruz A., Dikli J., Galtarossa F., Ortega G., Palombini L., Pellumaj J., Pilotto E., Zago L., Zanon I.
The fusion excitation function for $^{12}C + {}^{24}Mg$ was recently measured down to few microbarns and it has been evidenced that the hindrance effect starts at a relative high sub-barrier cross-section (about 1 mb). This may be due to the $\alpha$-like structure of $^{24}Mg$ or to its prolate deformation. The investigation of hindrance in $^{12}C + {}^{26}Mg$ may establish the underlying physics because $^{26}Mg$ is also deformed but does not have an $\alpha$-like structure. Furthermore, the available data on $^{12}C + {}^{24}Mg$ far below the barrier are well reproduced by calculations in the one-dimensional barrier penetration model. This interesting feature should be checked in the nearby case $^{12}C + {}^{26}Mg$. For these reasons, an experiment aimed at measuring the deep sub-barrier fusion in the latter system was carried out at the Laboratori Nazionali di Legnaro, using $^{26}Mg$ beams from the XTU Tandem accelerator and detecting the fusion evaporation residues with a $E\Delta E$-ToF detector telescope following an electrostatic beam deflector. The results obtained will be presented in this contribution.