Dynamics and thermodynamics of fragment emission from excited sources

M. J. Ison and C. O. Dorso
Phys. Rev. C 71, 064603 – Published 22 June 2005

Abstract

In this paper we study the process of fragmentation of highly excited Lennard-Jones drops by studying the emission of stable fragments (clusters recognizable in configuration space that live more than a minimum lifetime). We focus on the dynamics and thermodynamics of the emitting sources and show, among other things, that this kind of process is a mixture of sequential and simultaneous events and that simultaneous events have a broad time distribution. We also show how a local equilibrium scenario comes up on top of expanding collective motion, allowing us to define and explore a local temperature, which turns out to be a strongly time-dependent quantity, signaling that we are facing an out-of-equilibrium process.

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  • Received 17 December 2004

DOI:https://doi.org/10.1103/PhysRevC.71.064603

©2005 American Physical Society

Authors & Affiliations

M. J. Ison and C. O. Dorso

  • Departamento de Física, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellón I, Ciudad Universitaria, Nuñez, 1428, Buenos Aires, Argentina

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Vol. 71, Iss. 6 — June 2005

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