Simulations based on experimental data obtained from multifragmenting quasi-fused nuclei produced in central 129Xe + natSn collisions have been used to deduce event by event freeze-out properties on the thermal excitation energy range 4-12 AMeV. From these properties and temperatures deduced from proton transverse momentum fluctuations constrained caloric curves have been built. At constant average volumes caloric curves exhibit a monotonous behaviour whereas for constrained pressures a backbending is observed. Such results support the existence of a first order phase transition for hot nuclei.
The behaviour of constrained caloric curves as ultimate signature of a phase transition for hot nuclei / B., B., S. Piantelli M. F., R., A., R., E., B., R., B., A., C., E., G., D., G., P., L., N., L.N., O., L., M., P., Rosato, E., R., R., Spadaccini, G., E., V., Vigilante, M.. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6596. - 420:(2013), pp. 1-11. (11th International Conference on Nucleus-Nucleus Collisions (NN2012) San Antonio, Texas, USA 27 May to 1 June 2012) [10.1088/1742-6596/420/1/012081].
The behaviour of constrained caloric curves as ultimate signature of a phase transition for hot nuclei
ROSATO, ELIO;SPADACCINI, GIULIO;VIGILANTE, MARIANO
2013
Abstract
Simulations based on experimental data obtained from multifragmenting quasi-fused nuclei produced in central 129Xe + natSn collisions have been used to deduce event by event freeze-out properties on the thermal excitation energy range 4-12 AMeV. From these properties and temperatures deduced from proton transverse momentum fluctuations constrained caloric curves have been built. At constant average volumes caloric curves exhibit a monotonous behaviour whereas for constrained pressures a backbending is observed. Such results support the existence of a first order phase transition for hot nuclei.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
