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

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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.

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Data Availability Statement

This manuscript has no associated data or the data will not be deposited. [Authors’ comment: There are no external data associated with the manuscript.]

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Authors and Affiliations

  1. Institut de Physique Nucléaire, CNRS/IN2P3, Univ. Paris-Sud, Université Paris-Saclay, Orsay, France

    B. Borderie & E. Galichet

  2. INFN, Sezione di Firenze, Sesto Fiorentino, Italy

    S. Piantelli

  3. SUBATECH, IMT Atlantique, Université de Nantes, CNRS-IN2P3, Nantes, France

    E. Bonnet

  4. Normandie Univ., ENSICAEN, UNICAEN, CNRS/IN2P3, LPC Caen, Caen, France

    R. Bougault, D. Gruyer, N. Le Neindre, O. Lopez, L. Manduci & M. Pârlog

  5. GANIL, (CEA/DRF-CNRS/IN2P3), Caen, France

    A. Chbihi, J. E. Ducret, J. D. Frankland & M. Henri

  6. Conservatoire National des Arts et Métiers, Paris, France

    E. Galichet

  7. Dipartimento di Fisica ‘E. Pancini’ and Sezione INFN, Università di Napoli “Federico II”, Naples, Italy

    M. La Commara & M. Vigilante

  8. INFN, Sezione di Catania, Catania, Italy

    I. Lombardo & G. Verde

  9. Ecole des Applications Militaires de l’Energie Atomique, Cherbourg, France

    L. Manduci

  10. Hulubei National Institute for R & D in Physics and Nuclear Engineering (IFIN-HH), Bucharest-Mágurele, Romania

    M. Pârlog

  11. Université Laval, Québec, Canada

    R. Roy

Authors
  1. B. Borderie
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  2. S. Piantelli
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  3. E. Bonnet
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  4. R. Bougault
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  5. A. Chbihi
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  6. J. E. Ducret
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  7. J. D. Frankland
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  8. E. Galichet
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  9. D. Gruyer
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  10. M. Henri
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  11. M. La Commara
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  12. N. Le Neindre
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  13. I. Lombardo
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  14. O. Lopez
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  15. L. Manduci
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  16. M. Pârlog
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  17. R. Roy
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  18. G. Verde
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  19. M. Vigilante
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Corresponding author

Correspondence to B. Borderie.

Additional information

Communicated by Nicolas Alamanos

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Borderie, B., Piantelli, S., Bonnet, E. et al. Negative heat capacity for hot nuclei using formulation from the microcanonical ensemble INDRA Collaboration. Eur. Phys. J. A 56, 101 (2020). https://doi.org/10.1140/epja/s10050-020-00109-9

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  • DOI: https://doi.org/10.1140/epja/s10050-020-00109-9

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