Pre-equilibrium emission of light charged particles: clustering in ${}^{46}Tii^{*}$.

Cicerchia M., Marchi T., Gramegna F., Cinausero M., Mabiala J., Fabris D., Caciolli A., Collazzuol G., Mengoni D., Degerlier M., Morelli L., Bruno M., D'Agostino M., Barlini S., Bini M., Pasquali G., Piantelli S., Casini G., Pastore G., Gruyer D., Ottanelli P., Valdré S., Gelli N., Olmi A., Poggi G., Vardaci E., Lombardo I., Dell'Aquila D., Leoni S., Cieplicka N., Fornal B.
  Mercoledì 28/09   10:00 - 13:00   Edificio Psicologia 2 - Aula 3F   I - Fisica nucleare e subnucleare
In view of the great interest in the nuclear clustering, the NUCL-EX collaboration (INFN, Italy) is carrying out a research campaign studying pre-equilibrium emission of light charged particles (LCP) and cluster properties of light- and medium-mass nuclei. In particular, the emission of LCP from hot ${}^{46}Ti$ nuclei formed in the three fusion evaporation reactions, ${}^{16}}O+{}^{30}Si$, ${}^{18}}O+{}^{28}Si$ and ${}^{19}F+{}^{27}Al$, was investigated, using the GARFIELD+RCo $4\pi$ setup, fully equipped with digital electronics. Since the bombarding energy per nucleon influences the abundance of pre-equilibrium particles, it was kept constant (7 A MeV) for the three reactions. Therefore, the non-equilibrium processes are expected to be almost the same. The experimental data are compared with the predictions of simulated events generated with the statistical model GEMINI++ and filtered with a software replica of our apparatus in order to take into account the experimental conditions. After a general introduction on the experimental campaign, the preliminary results for the three systems will be discussed.