Negative heat capacity for hot nuclei: Confirmation with formulation from the microcanonical ensemble

Borderie, B. and Piantelli, S. and Frankland, J. D. and Le Neindre, N. (2022) Negative heat capacity for hot nuclei: Confirmation with formulation from the microcanonical ensemble. Il nuovo cimento C, 45 (3). pp. 1-8. ISSN 1826-9885

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Abstract

By using freeze-out properties of multifragmenting hot nuclei produced in quasifusion central 129Xe + natSn 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 4π 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 indicates a first order phase transition for finite systems is observed and confirms previous results using a different method.

Item Type:	Article
Subjects:	500 Scienze naturali e Matematica > 530 Fisica
Depositing User:	Marina Spanti
Date Deposited:	30 Jun 2022 14:39
Last Modified:	30 Jun 2022 14:39
URI:	http://eprints.bice.rm.cnr.it/id/eprint/21934

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