The excited nuclear systems formed in heavy ion collisions can be studied from a thermodynamical point of view. Charged finite systems have different behaviors with respect to infinite ones. After experimental selection of such equilibrated systems the extraction of thermodynamic coordinates is performed. Different signals compatible with a liquid-gas phase transition have been obtained. In particular a bimodal distribution of the asymmetry between the first two heaviest fragments is presented. Abnormally large fluctuations, which in thermodynamic equilibrium are associated to a negative branch of the heat capacity give indications of a first order phase transition. Perspectives for new generation experiments are indicated.
M. BRUNO, F. CANNATA, M. D'AGOSTINO, J. DE SANCTIS, S. FABBRI, E. FUSCHINI, et al. (2004). THERMODYNAMICAL ASPECTS IN HEAVY ION REACTIONS. HONG KONG : World Scientific.
THERMODYNAMICAL ASPECTS IN HEAVY ION REACTIONS
BRUNO, MAURO;CANNATA, FRANCESCO;D'AGOSTINO, MICHELA;DE SANCTIS, JACOPO;FABBRI, SERENA;GERACI, ELENA IRENE;VANNINI, GIANNI;VERONDINI, ETTORE;
2004
Abstract
The excited nuclear systems formed in heavy ion collisions can be studied from a thermodynamical point of view. Charged finite systems have different behaviors with respect to infinite ones. After experimental selection of such equilibrated systems the extraction of thermodynamic coordinates is performed. Different signals compatible with a liquid-gas phase transition have been obtained. In particular a bimodal distribution of the asymmetry between the first two heaviest fragments is presented. Abnormally large fluctuations, which in thermodynamic equilibrium are associated to a negative branch of the heat capacity give indications of a first order phase transition. Perspectives for new generation experiments are indicated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
