# Negative heat capacity for hot nuclei using formulation from the microcanonical ensemble INDRA Collaboration

Abstract : By using freeze-out properties of multifragmenting hot nuclei produced in quasifusion central $^{129}\hbox {Xe}+^{nat}\hbox {Sn}$ collisions at different beam energies (32, 39, 45 and 50 AMeV) which were estimated by means of a simulation based on experimental data collected by the $4\pi$ INDRA multidetector, heat capacity in the thermal excitation energy range 4–12.5 AMeV was calculated from total kinetic energies and multiplicities at freeze-out. The microcanonical formulation was employed. Negative heat capacity which signs a first order phase transition for finite systems is observed and confirms previous results using a different method.
Document type :
Journal articles

https://hal.archives-ouvertes.fr/hal-02550176
Contributor : Inspire Hep <>
Submitted on : Wednesday, April 22, 2020 - 2:46:08 AM
Last modification on : Tuesday, June 30, 2020 - 10:21:30 PM

### Citation

B. Borderie, S. Piantelli, E. Bonnet, R. Bougault, A. Chbihi, et al.. Negative heat capacity for hot nuclei using formulation from the microcanonical ensemble INDRA Collaboration. Eur.Phys.J.A, 2020, 56 (3), pp.101. ⟨10.1140/epja/s10050-020-00109-9⟩. ⟨hal-02550176⟩

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