The behaviour of constrained caloric curves as ultimate signature of a phase transition for hot nuclei

B. Borderie; E. Galichet; M.F. Rivet; S. Piantelli; Ad. R. Raduta; E. Bonnet; A. Chbihi; J. D. Frankland; R. Bougault; O. Lopez; E. Vient; N. Le Neindre; M. Pârlog; D. Guinet; Ph. Lautesse; E. Rosato; M. Vigilante; G. Spadaccini; Roy R.

HAL: hal-00720759, version 1

arXiv: 1207.6085

DOI: 10.1088/1742-6596/420/1/012081

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11th International Conference on Nucleus-Nucleus Collisions (NN2012), San Antonio, Texas : États-Unis (2012)

The behaviour of constrained caloric curves as ultimate signature of a phase transition for hot nuclei

B. Borderie¹, E. Galichet¹, M.F. Rivet¹, S. Piantelli², Ad. R. Raduta³, E. Bonnet⁴, A. Chbihi⁴, J. D. Frankland⁴, R. Bougault⁵, O. Lopez⁵, E. Vient⁵, N. Le Neindre⁵, M. Pârlog⁵, D. Guinet⁶, Ph. Lautesse⁶, E. Rosato⁷, M. Vigilante⁷, G. Spadaccini⁷, Roy R.⁸

(2013)

Simulations based on experimental data obtained from multifragmenting quasifused 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.

1:	IPNO - Institut de Physique Nucléaire d'Orsay

2:	INFN, Sezione di Firenze - Istituto Nazionale di Fisica Nucleare, Sezione di Firenze

3:	NIPNE - Horia Hulubei National Institute of Physics and Nuclear Engineering

4:	GANIL - Grand Accélérateur National d'Ions Lourds

5:	LPCC - Laboratoire de Physique Corpusculaire de Caen

6:	IPNL - Institut de Physique Nucléaire de Lyon

7:	INFN, Sezione di Napoli - Istituto Nazionale di Fisica Nucleare, Sezione di Napoli

8:	Laboratoire de Physique Nucléaire

Research team: Dynamique et thermodynamique nucléaire

Subject

Physics/Nuclear Experiment

Physics/Nuclear Theory

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hal-00720759, version 1
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From: Bernard Borderie <>
Submitted on: Wednesday, 25 July 2012 17:48:34
Updated on: Tuesday, 26 March 2013 10:17:40