Negative heat capacity for hot nuclei using formulation from the microcanonical ensemble INDRA Collaboration
Nuclear Experiment
2020-10-14 v1 Statistical Mechanics
Nuclear Theory
Abstract
By using freeze-out properties of multifragmenting hot nuclei produced in quasifusion central Xe+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 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.
Cite
@article{arxiv.2010.02736,
title = {Negative heat capacity for hot nuclei using formulation from the microcanonical ensemble INDRA Collaboration},
author = {B. Borderie and S. Piantelli and E. Bonnet and R. Bougault and A. Chbihi and J. E. Ducret and J. D. Frankland and E. Galichet and D. Gruyer and M. Henri and M. La Commara and N. Le Neindre and I. Lombardo and O. Lopez and L. Manduci and M. Parlog and R. Roy and G. Verde. M. Vigilante},
journal= {arXiv preprint arXiv:2010.02736},
year = {2020}
}
Comments
6 pages,5 figures. arXiv admin note: text overlap with arXiv:1903.02881