Caloric Curves and Energy Fluctuations in the Microcanonical Liquid-Gas Phase Transition
Authors:
- 23 October 2000
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 85 (17) , 3587-3590
Abstract
In this paper we study a microcanonical lattice gas model with a constrained average volume. We show that the caloric curve explicitly depends on the considered transformation of the volume with the excitation energy and so does not bear direct information on the characteristics of the phase transition. Conversely, partial energy fluctuations are demonstrated to be a direct measure of the equation of state. Since the heat capacity has a negative branch in the phase transition region, the presence of abnormally large kinetic energy fluctuations is a signal of the liquid-gas phase transition.Keywords
This publication has 20 references indexed in Scilit:
- Negative heat capacity in the critical region of nuclear fragmentation: an experimental evidence of the liquid-gas phase transitionPhysics Letters B, 2000
- Thermodynamical features of multifragmentation in peripheral Au + Au collisions at 35 A MeVNuclear Physics A, 1999
- Energy correlations as thermodynamical signals for phase transitions in finite systemsNuclear Physics A, 1999
- Isotopic and microcanonical temperatures in nuclear multifragmentationPhysical Review C, 1998
- Surveying the nuclear caloric curvePhysics Letters B, 1997
- Microcanonical thermodynamics and statistical fragmentation of dissipative systems. The topological structure of the N-body phase spacePhysics Reports, 1997
- Probing the Nuclear Liquid-Gas Phase TransitionPhysical Review Letters, 1995
- Statistical multifragmentation of nucleiPhysics Reports, 1995
- Statistical multifragmentation of nucleiNuclear Physics A, 1985
- Systems with negative specific heatThe European Physical Journal A, 1970