On the reliability of negative heat capacity measurements
M. D'Agostino, R. Bougault, F. Gulminelli, M. Bruno, F. Cannata, Ph. Chomaz, F. Gramegna, I. Iori, N. Le Neindre, G. V. Margagliotti, A. Moroni, G. Vannini
Abstract
A global protocol for the thermostatistical analysis of hot nuclear sources is discussed. Within our method of minimization of variances we show that the abnormal kinetic energy fluctuation signal recently reported in different experimental data (M.D'Agostino et al.-Phys. Lett. B 473 (2000) 219, N. Le Neindre et al.- contr. to the XXXVIII Bormio Winter Meeting on Nucl. Phys. (2001) 404) is a genuine signal of a first order phase transition in a finite system.
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