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Negative heat capacities and first order phase transitions in nuclei and other mesoscopic systems

2000/12/11 by L.G. Moretto, L. G. Moretto, Moretto, L. G. +6
Engineering · Materials Science · Physics and Astronomy · #Adhesion, Friction, and Surface Interactions #Brake Systems and Friction Analysis #Condensed Matter (cond-mat) #FOS: Physical sciences #Material Dynamics and Properties #Nuclear Theory (nucl-th) #cond-mat #nucl-th

paper · pdf · doi:10.48550/arxiv.nucl-th/0012037

five pages, two columns, four figures, added references

openalex publication_date 2000/12/11 · arxiv created 2001/03/02 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

The origin of predicted and observed anomalies in caloric curves of nuclei and other mesoscopic systems is investigated. It is shown that a straightforward thermodynamical treatment of an evaporating liquid drop leads to a backbending in the caloric curve and to negative specific heats in the two phase coexistence region. The cause is found not in the generation of additional surface, but in the progressive reduction of the drop's radius, and surface, with evaporation.

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