Alpha-particle condensation in excited 12C

Abstract

The fragmentation of quasi-projectiles from the nuclear reaction ${}^{40}Ca$+${}^{12}C$ at 25 MeV/nucleon was used to produce excited states candidates to $\hat{I}\pm$-particle condensation. The methodology relies on high granularity 4$\ddot{I}€$ detection coupled to correlation function techniques. Under the assumption that the equality among the kinetic energies of the emitted $\hat{I}\pm$-particles and the emission simultaneity constitutes a reliable fingerprint of $\hat{I}\pm$ condensation, we identify several tens of events corresponding to the deexcitation of the Hoyle state of ${}^{12}$C which fulfill the condition.

5 pages, 3 figures