5th International Symposium on Nuclear Symmetry Energy NuSYM15, June 29 - July 2, 2015 Kraków, POLAND

Lucia Quattrocchi
Università degli Studi di Messina, ITALY

Multi-alpha correlations in 12C induced dissipative collisions at intermediate energies

Lucia Quattrocchi$^{1,2}$, Giuseppe Verde$^{3,4}$
$^{1}$ Università degli Studi di Messina
$^{2}$ INFN- Gruppo Collegato di Messina
$^{3}$ IPN Orsay
$^{4}$ INFN Sezione di Catania

Two and multi particle correlations from the decay of sources produced in $^{12}$C+$^{24}$Mg and $^{12}$C+$^{208}$Pb collisions at E=35 AMeV have been studied by using the forward part $(1^\circ < θ_{lab} < 30^\circ)$ of the CHIMERA multi-detector. Correlations and invariant mass spectroscopy are used to explore simultaneous and sequential decays of resonances in light isotopes with Z~3-6, produced in peripheral collisions via the break-up of excited quasi-projectiles. Among them we mention $^{5}$Li, $^{6}$Li, $^{6}$Be, $^{8}$Be and the astrophysically important states in $^{12}$C decaying into three alpha particles. Exploration of spectroscopy features such as branching ratios with respect to different decay channels (sequential vs simultaneous) as well as thermal features such as internal population of states are expected to provide important information on interplays between reaction mechanism and nuclear structure in a dilute and hot nuclear medium away from saturation. Results and future perspectives at the INFN-LNS will be presented.