Isoscaling and symmetry energy in dynamical fragment formation

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In medium energy heavy ion collisions, fragments are formed in an expanding system. The isospin composition of the produced fragments may reflect the symmetry energy of such low-density nuclear matter. In fact, the simulations by antisymmetrized molecular dynamics (AMD) show that the fragment isospin composition is basically consistent with the statistical expectations even in dynamically evolving system. Isoscaling is satisfied by the AMD results. The width of the fragment isotope distribution can be explained by the ratio of the symmetry energy to the temperature if the symmetry energy at a reduced density is assumed to be relevant. This assumption is justified by studying the dependence on the density-dependent symmetry energy. The symmetry energy extracted from the AMD results is almost independent of the fragment size, which suggests that the fragment isospin composition is governed by the symmetry energy of low-density uniform matter rather than the symmetry energies for isolated nuclei.

Original languageEnglish
Title of host publicationREACTION MECHANISMS FOR RARE ISOTOPE BEAMS
Subtitle of host publication2nd Argonne/MSU/JINA/INT RIA Workshop
Pages83-92
Number of pages10
DOIs
Publication statusPublished - 2005 Oct 14
Event2nd Argonne/MSU/JINA/INT RIA Workshop on Reaction Mechanisms for Rare Isotope Beams - East Lansing, MI, United States
Duration: 2005 Mar 92005 Mar 12

Publication series

NameAIP Conference Proceedings
Volume791
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other2nd Argonne/MSU/JINA/INT RIA Workshop on Reaction Mechanisms for Rare Isotope Beams
CountryUnited States
CityEast Lansing, MI
Period05/3/905/3/12

Keywords

  • Antisymmetrized molecular dynamics
  • Isoscaling
  • Multifragmentation
  • Symmetry energy

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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