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.
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Submitted on : Tuesday, May 7, 2013 - 12:27:05 PM
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B. Borderie, S. Piantelli, M. F. Rivet, Ad. R. Raduta, G. Ademard, et al.. Constrained caloric curves and phase transition for hot nuclei. Physics Letters B, Elsevier, 2013, 723 (1-3), pp.140-144. ⟨10.1016/j.physletb.2013.05.004⟩. ⟨hal-00821065⟩

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