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Research on critical behaviour during fragmentation of the projectile in the Xe+Sn (at 50 MeV/A) reaction; Recherche d`un comportement critique dans la fragmentation du projectile dans la reaction Xe+Sn a 50 MeV/A

Abstract

The study of moments of fragments charge distributions produced in heavy ions collisions can give us evidence of a critical behavior of nuclear matter which could explain the multifragmentation pattern. From an experimental point of view, in order to perform this capabilities of the INDRA detector has made it possible to identify all these particles and to reconstruct the initial projectile-like fragment coming from binary collisions in the reaction Xe+Sn at 50 MeV/A. We have selected events where the initial projectile-like fragments keep their entire charge in a large range of excitation energy. The study of these fragment`s characteristics show clearly a change in the deexcitation pattern. The evolution of moments of the fragment charge distributions has been reproduced within a percolation model, in this sense we can interpreter this change in the deexcitation pattern as a function of the initial projectile-like fragment`s size shows the existence of finite-size effects. However, the signature of a phase transition remains independent on the projectile-like fragment`s size. (author). 74 refs., 58 figs., 9 tabs.
Authors:
Publication Date:
Mar 01, 1995
Product Type:
Thesis/Dissertation
Report Number:
GANIL-T-95-02
Reference Number:
SCA: 663450; PA: AIX-28:032354; EDB-97:058557; NTS-97:012206; SN: 97001766100
Resource Relation:
Other Information: TH: These (D. es Sc.).; PBD: Mar 1995
Subject:
66 PHYSICS; NUCLEAR FRAGMENTATION; HEAVY ION REACTIONS; CALIBRATION; ENERGY LOSSES; FINITE-RANGE INTERACTIONS; HEAVY IONS; PHASE TRANSFORMATIONS; QUASI PARTICLES; RADIATION DETECTORS; SCINTILLATION COUNTERS
OSTI ID:
455114
Research Organizations:
Grand Accelerateur National d`Ions Lourds (GANIL), 14 - Caen (France); Valencia Univ. (Spain)
Country of Origin:
France
Language:
French
Other Identifying Numbers:
Other: ON: DE97621262; TRN: FR9601307032354
Availability:
INIS; OSTI as DE97621262
Submitting Site:
FRN
Size:
158 p.
Announcement Date:
Apr 17, 1997

Citation Formats

Benlliure, J. Research on critical behaviour during fragmentation of the projectile in the Xe+Sn (at 50 MeV/A) reaction; Recherche d`un comportement critique dans la fragmentation du projectile dans la reaction Xe+Sn a 50 MeV/A. France: N. p., 1995. Web.
Benlliure, J. Research on critical behaviour during fragmentation of the projectile in the Xe+Sn (at 50 MeV/A) reaction; Recherche d`un comportement critique dans la fragmentation du projectile dans la reaction Xe+Sn a 50 MeV/A. France.
Benlliure, J. 1995. "Research on critical behaviour during fragmentation of the projectile in the Xe+Sn (at 50 MeV/A) reaction; Recherche d`un comportement critique dans la fragmentation du projectile dans la reaction Xe+Sn a 50 MeV/A." France.
@misc{etde_455114,
title = {Research on critical behaviour during fragmentation of the projectile in the Xe+Sn (at 50 MeV/A) reaction; Recherche d`un comportement critique dans la fragmentation du projectile dans la reaction Xe+Sn a 50 MeV/A}
author = {Benlliure, J}
abstractNote = {The study of moments of fragments charge distributions produced in heavy ions collisions can give us evidence of a critical behavior of nuclear matter which could explain the multifragmentation pattern. From an experimental point of view, in order to perform this capabilities of the INDRA detector has made it possible to identify all these particles and to reconstruct the initial projectile-like fragment coming from binary collisions in the reaction Xe+Sn at 50 MeV/A. We have selected events where the initial projectile-like fragments keep their entire charge in a large range of excitation energy. The study of these fragment`s characteristics show clearly a change in the deexcitation pattern. The evolution of moments of the fragment charge distributions has been reproduced within a percolation model, in this sense we can interpreter this change in the deexcitation pattern as a function of the initial projectile-like fragment`s size shows the existence of finite-size effects. However, the signature of a phase transition remains independent on the projectile-like fragment`s size. (author). 74 refs., 58 figs., 9 tabs.}
place = {France}
year = {1995}
month = {Mar}
}