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EnglishThe 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.
| Titolo: | THERMODYNAMICAL ASPECTS IN HEAVY ION REACTIONS |
| Autore/i: | BRUNO, MAURO; CANNATA, FRANCESCO; D'AGOSTINO, MICHELA; DE SANCTIS, JACOPO; FABBRI, SERENA; E. FUSCHINI; GERACI, ELENA IRENE; B. GUIOT; VANNINI, GIANNI; VERONDINI, ETTORE; F. GULMINELLI; P.H. CHOMAZ; G. CASINI; M. CHIARI; A. NANNINI; S. BARLINI; F. GRAMEGNA; V. KRAVCHUK; A. LANCHAIS; L. VANNUCCI; A. MORONI; A. ORDINE; U. ABBONDANNO; G. V. MARGAGLIOTTI |
| Autore/i Unibo: | |
| Anno: | 2004 |
| Titolo del libro: | RECENT ACHIEVEMENTS AND PERSPECTIVES IN NUCLEAR PHYSICS Proceedings of the 5th Italy-Japan Symposium |
| 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. |
| Data prodotto definitivo in UGOV: | 16-ott-2005 |
| Appare nelle tipologie: | 4.01 Contributo in Atti di convegno |
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