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Title: Density reorganization in hot nuclei

Abstract

The density profile of a hot nuclear system produced in intermediate-energy heavy ion collisions is studied in a microcanonical formulation with a momentum and density dependent finite range interaction. The caloric curve and density evolution with excitation are calculated for a number of systems for the equilibrium mononuclear configuration; they compare favorably with the recent experimental data. The studied density fluctuations are seen to build up rapidly beyond an excitation energy of {approx}8 MeV/u indicating the instability of the system toward nuclear disassembly. Explicit introduction of deformation in the expansion path of the heated nucleus, however, shows that the system might fragment even earlier. We also explore the effects of the nuclear equation of state and of the mass and isospin asymmetry on the nuclear equilibrium configuration and the relevant experimental observables.

Authors:
;  [1]; ;  [2]
  1. Saha Institute of Nuclear Physics, 1/AF Bidhannagar, Kolkata 700064 (India)
  2. Departament d'Estructura i Constituents de la Materia, Facultat de Fisica, Universitat de Barcelona, Diagonal 647, E-08028 Barcelona (Spain)
Publication Date:
OSTI Identifier:
20995294
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review. C, Nuclear Physics; Journal Volume: 75; Journal Issue: 5; Other Information: DOI: 10.1103/PhysRevC.75.054608; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; ASYMMETRY; COMPARATIVE EVALUATIONS; CONFIGURATION; DEFORMATION; DENSITY; EQUATIONS OF STATE; EQUILIBRIUM; EXCITATION; FINITE-RANGE INTERACTIONS; FLUCTUATIONS; HEAVY ION REACTIONS; HOT NUCLEI; ISOSPIN; MEV RANGE 01-10

Citation Formats

Samaddar, S. K., De, J. N., Vinas, X., and Centelles, M.. Density reorganization in hot nuclei. United States: N. p., 2007. Web. doi:10.1103/PHYSREVC.75.054608.
Samaddar, S. K., De, J. N., Vinas, X., & Centelles, M.. Density reorganization in hot nuclei. United States. doi:10.1103/PHYSREVC.75.054608.
Samaddar, S. K., De, J. N., Vinas, X., and Centelles, M.. Tue . "Density reorganization in hot nuclei". United States. doi:10.1103/PHYSREVC.75.054608.
@article{osti_20995294,
title = {Density reorganization in hot nuclei},
author = {Samaddar, S. K. and De, J. N. and Vinas, X. and Centelles, M.},
abstractNote = {The density profile of a hot nuclear system produced in intermediate-energy heavy ion collisions is studied in a microcanonical formulation with a momentum and density dependent finite range interaction. The caloric curve and density evolution with excitation are calculated for a number of systems for the equilibrium mononuclear configuration; they compare favorably with the recent experimental data. The studied density fluctuations are seen to build up rapidly beyond an excitation energy of {approx}8 MeV/u indicating the instability of the system toward nuclear disassembly. Explicit introduction of deformation in the expansion path of the heated nucleus, however, shows that the system might fragment even earlier. We also explore the effects of the nuclear equation of state and of the mass and isospin asymmetry on the nuclear equilibrium configuration and the relevant experimental observables.},
doi = {10.1103/PHYSREVC.75.054608},
journal = {Physical Review. C, Nuclear Physics},
number = 5,
volume = 75,
place = {United States},
year = {Tue May 15 00:00:00 EDT 2007},
month = {Tue May 15 00:00:00 EDT 2007}
}