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

By using freeze-out properties of multifragmenting hot nuclei produced in quasifusion central 129 Xe + nat 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 π INDRA multidetector, heat capacit...

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Published in:The European physical journal. A, Hadrons and nuclei Hadrons and nuclei, 2020, Vol.56 (3), Article 101
Main Authors: Borderie, B., Piantelli, S., Bonnet, E., Bougault, R., Chbihi, A., Ducret, J. E., Frankland, J. D., Galichet, E., Gruyer, D., Henri, M., Commara, M. La, Neindre, N. Le, Lombardo, I., Lopez, O., Manduci, L., Pârlog, M., Roy, R., Verde, G., Vigilante, M.
Format: Article
Language:English
Subjects:
Beams (radiation)
Hadrons
Heavy Ions
Letter to the Editor
Nuclear Experiment
Nuclear Fusion
Nuclear Physics
Nuclei
Particle and Nuclear Physics
Phase transitions
Physics
Physics and Astronomy
Specific heat
Xenon 129
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Summary:By using freeze-out properties of multifragmenting hot nuclei produced in quasifusion central 129 Xe + nat 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 π 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.
ISSN:1434-6001
1434-601X
DOI:10.1140/epja/s10050-020-00109-9