Constrained caloric curves and phase transition for hot nuclei

Abstract

Simulations based on experimental data obtained from multifragmenting quasi-fused nuclei produced in central ${}^{129}$Xe + ${}^{nat}$Sn collisions have been used to deduce event by event freeze-out properties in the thermal excitation energy range 4-12 AMeV [Nucl. Phys. A809 (2008) 111]. From these properties and the temperatures deduced from proton transverse momentum fluctuations, constrained caloric curves have been built. At constant average volumes caloric curves exhibit a monotonic behaviour whereas for constrained pressures a backbending is observed. Such results support the existence of a first order phase transition for hot nuclei.

14 pages, 5 figures, accepted in Physics Letters B

References in corpus (7)

• Nuclear multifragmentation and phase transition for hot nuclei
• Bimodal behavior of the heaviest fragment distribution in projectile fragmentation
• Density and Temperature of Fermions from Quantum Fluctuations
• Comparison of dynamical multifragmentation models
• Fragment properties of fragmenting heavy nuclei produced in central and semi-peripheral collisions
• Estimate of average freeze-out volume in multifragmentation events
• Bimodality - a general feature of heavy ion reactions

Cited by in corpus (10)

• Dynamics of clusters and fragments in heavy-ion collisions
• The many facets of the (non relativistic) Nuclear Equation of State
• Liquid-Gas phase transition in nuclei
• Phase transition dynamics for hot nuclei
• Coulomb corrections to density and temperature of bosons in heavy ion collisions
• Coulomb corrections to density and temperature in heavy ion collisions
• Reaction and fusion cross sections for the near-symmetric system ${}^{129}Xe{+}^{nat}Sn$ from $8$ to $35$ $AMeV$
• Statistical treatment of nuclear clusters in the continuum
• Critical Properties of Symmetric Nuclear Matter in Low-Density Regime Using Effective-Relativistic Mean Field Formalism
• Investigation of the nuclear liquid-gas phase transition in the static AMD